Practice Test

Q1) The distances transversed, during equal intervals of time, by a body falling from rest, stand to one another in the same ratio as Show Answer

Q2) Mark the wrong statement in the following for one dimensional motion Show Answer

Q3) Mark the incorrect statement in the following Show Answer

Q4) A drunkard walking in a narrow lane takes 5 steps forward and 3 steps backward followed again by 5 steps forward and 3 steps backward and so on. Each step is 1 m long and requires 1 s. The time the drunkard takes to fall in a pit 13 m away is Show Answer

Q5) Mark the true statement
A particle in one - dimensional motion Show Answer

Q6) Which one of the following equations represents the motion of a body with finite constant acceleration? In these equations, y denotes the displacement of the body at time t and a, b and c are constants of motion. Show Answer

Q7) A pebble is dropped into a well of depth h. The splash is heard after time t. If c be the velocity of sound, then Show Answer

Q8) Which of the following curves represents the v-t graph of an object falling a metallic surface and bouncing back? Show Answer

Q9) Which one of the following represents the time-displacement graph of two objects P and Q moving with zero relative speed? Show Answer

Q10) Which of the following represents uniform speed? Show Answer

Q11) From a high tower at time t = 0, one stone is dropped from rest and simultaneously another stone is projected vertically up with an initial velocity. The graph of the distance 's' between the two stones, before either hits the ground, plotted against time 't' will as Show Answer

Q12) A particle starting from rest with uniform acceleration travels a distance x in first 2 seconds and a distance y in next 2 second, then Show Answer

Q13) Statement 1 : For straight line motion, the velocity and acceleration of an object are always along the same straight line.
Statement 2 : Only the magnitude of velocity changes due to acceleration in straight line motion. Show Answer

Q14) Statement 1 : The magnitude of average velocity is the same as the average speed.
Statement 2 : The magnitude of instantaneous velocity is the magnitude of instantaneous speed. Show Answer

Q15) Displacement of the particle in time t is Show Answer

Q16) Velocity of particle at t = 0 is Show Answer

Q17) Acceleration of particle at t = 0 Show Answer

Q18) P, Q and R are three balloons ascending with velocities u, 4u and 8u respectively. If stones of the same mass be dropped from each, when they are at the same height then Show Answer

Q19) Which of the following graphs represents the distance-time variation of a body released from the top of a building? Show Answer

Q20) A particle starts from rest and moves along a straight line with constant acceleration. The variation of velocity v with displacement s is Show Answer

Q21) Which of the following represents an impossible situation? Show Answer

Q22) A body released from the top of a tower falls through half the height of the tower in 2 s. In what time shall the body fall through the height of the tower? Show Answer

Q23) Two bodies begin a free fall from the same height at a time interval of N s. If vertical separation between the two bodies is 1 after n second from the start of the first body, then n is equal to Show Answer

Q24) Statement 1 : When velocity is zero, acceleration is zero.
Statement 2 : Rate of change of velocity is acceleration. Show Answer

Q25) Statement 1 : If a = -2 t for a particle moving in a straight line starting with an initial velocity 4 m/s from the origin, then distance traveled by it in 2 seconds is same as displacement.
Statement 2 : Velocity changes direction after 2 s only. Show Answer

Q26) Velocity versus time graph is Show Answer

Q27) Acceleration versus time graph is Show Answer

Q28) Velocity versus position graph is (taking origin on ground) Show Answer

Q29) A Body moves 6 m north. 8 m east and 10m vertically upwards, what is its resultant displacement from initial position Show Answer

Q30) A man goes 10m towards North, then 20m towards east then displacement is Show Answer

Q31) An aeroplane flies 400 m north and 300 m south and then flies 1200 m upwards then net displacement is Show Answer

Q32) An athlete completes one round of a circular track of radius R in 40 sec. What will be his displacement at the end of 2 min. 20 sec Show Answer

Q33) A wheel of radius 1 meter rolls forward half a revolution on a horizontal ground. The magnitude of the displacement of the point of the wheel initially in contact with the ground is Show Answer

Q34) A person travels along a straight road for half the distance with velocity and the remaining half distance with velocity The average velocity is given by Show Answer

Q35) A car travels from A to B at a speed of and returns at a speed of . The average speed of the car for the whole journey is Show Answer

Q36) A boy walks to his school at a distance of 6 km with constant speed of 2.5 km / hour and walks back with a constant speed of 4 km / hr. His average speed for round trip expressed in km / hour, is Show Answer

Q37) A car travels the first half of a distance between two places at a speed of 30 km/hr and the second half of the distance at 50 km/hr. The average speed of the car for the whole Show Answer

Q38) One car moving on a straight road covers one third of the distance with 20 km/hr and the rest with 60 km/hr. The average speed is Show Answer

Q39) A car moves for half of its time at 80 km/h and for rest half of time at 40 km/h. Total distance covered is 60 km. What is the average speed of the car Show Answer

Q40) A train has a speed of 60 km/h. for the first one hour and 40 km/h for the next half hour. Its average speed in km/h is Show Answer

Q41) Which of the following is a one dimensional motion Show Answer

Q42) A 150 m long train is moving with a uniform velocity of 45 km/h. The time taken by the train to cross a bridge of length 850 meters is Show Answer

Q43) A particle is constrained to move on a straight line path. It returns to the starting point after 10 sec. The total distance covered by the particles during this time is 30. Which of the followi9ng statements about the motion of the particle is false. Show Answer

Q44) A particle moves along a semicircle of radius 10m in 5 seconds.The average velocity of the particle is Show Answer

Q45) A man walks on a straight road from his home to a market 2.5 km away with a speed of 5 km/h. Finding the market closed, he instantly turns and walk back home with a speed of 7.6km/h. The average of the man over the interval of time 0 to 40 min is equal to. Show Answer

Q46) The ratio of the numerical values of the average velocity and average speed of a body is always. Show Answer

Q47) The numerical ratio of displacement to the distance covered is always Show Answer

Q48) A100m long train is moving with a uniform velocity of 45 km/hr. The time taken by the train to cross a bridge of length 1 km is Show Answer

Q49) A particle moves for 20 seconds with velocity 3 m/s and the velocity 4 m/s for another 20 seconds and finally moves with velocity 5 m/s for next 20 seconds. What is the average velocity of the particle Show Answer

Q50) The correct statement from the following is Show Answer

Q51) A bullet fired into a fixed target loses half of its velocity after penetrating 3 cm. How much further it will penetrate before coming to rest assuming that it faces constant resistance to motion? Show Answer

Q52) A Car travels half the distance with constant velocity of 40 kmph and the remaining half with a constant velocity of 60 kmph. The average velocity of the car in kmph is Show Answer

Q53) The displacement of a body is given to be proportional to the cube of time elapsed. The magnitude of the acceleration of the body is Show Answer

Q54) The instantaneous velocity of a body can be measured Show Answer

Q55) A body under the action of several forces will have zero acceleration Show Answer

Q56) The acceleration of a moving body can be found from Show Answer

Q57) The initial velocity of a particle is u (at t =0) and the acceleration f is given by at. Which of the following relation is valid Show Answer

Q58) A motor car moving with a uniform speed of 20 m / sec comes to stop on the application of brakes after travelling a distance of 10 m Its acceleration is Show Answer

Q59) A particle starting from rest travels a distance x in first 2 seconds and a distance y in next two seconds, then Show Answer

Q60) Which of the following four statements is false Show Answer

Q61) A particle moving with a uniform acceleration travels 24 m and 64 m in the first two consecutive intervals of 4 sec each. Its initial velocity is Show Answer

Q62) An alpha particle enters a hollow tube of 4 m length with an initial speed of 1 km/s. It is accelerated in the tube and comes out of it with a speed of 9 km/s. The time for which it remains inside the tube is Show Answer

Q63) A body of mass 10 kg is moving with a constant velocity of 10m/s. When a constant force acts for 4 seconds on it, it moves with a velocity 2 m/sec in the opposite direction. The acceleration produced in it is Show Answer

Q64) A car moving with a velocity of 10 m/s can be stopped by the application of a constant force F in a distance of 20 m. If the velocity of the car is 30 m/s, it can be stopped by this force in Show Answer

Q65) A car moving with a speed of 40 km/h can be stopped by applying brakes after atleast 2 m. If the same car is moving with a speed of 80 km/h, what is the minimum stopping distance Show Answer

Q66) An elevator car, whose floor to ceiling distance is equal to 2.7 m, starts ascending with constant acceleration of 1.2 ms–2. 2 sec after the start, a bolt begins fallings from the ceiling of the car. The free fall time of the bolt is Show Answer

Q67) Two trains travelling on the same track are approaching each other with equal speeds of 40 m/s. The drivers of the trains begin to decelerate simultaneously when they are just 2.0 km apart. Assuming the decelerations to be uniform and equal, the value of the deceleration to barely avoid collision should be Show Answer

Q68) A boggy of uniformly moving train is suddenly detached from train and stops after covering some distance. The distance covered by the boggy and distance covered by the train in the same time has relation Show Answer

Q69) A body starts from rest. What is the ratio of the distance travelled by the body during the 4th and 3rd second Show Answer

Q70) For a moving body at any instant of time Show Answer

Q71) If a car at rest accelerates uniformly to a speed of 144 km/h in 20 s. Then it covers a distance of Show Answer

Q72) A truck and a car are moving with equal velocity. On applying the brakes both will stop after certain distance, then Show Answer

Q73) If a train travelling at 72 kmph is to be brought to rest in a distance of 200 metres, then its retardation should be Show Answer

Q74) What is the relation between displacement, time and acceleration in case of a body having uniform acceleration Show Answer

Q75) A particle travels 10m in first 5 sec and 10m in next 3 sec. Assuming constant acceleration what is the distance travelled in next 2 sec Show Answer

Q76) The distance travelled by a particle is proportional to the squares of time, then the particle travels with Show Answer

Q77) Acceleration of a particle changes when Show Answer

Q78) A constant force acts on a body of mass 0.9 kg at rest for 10s. If the body moves a distance of 250 m, the magnitude of the force is Show Answer

Q79) Consider the acceleration, velocity and displacement of a tennis ball as it falls to the ground and bounces back. Directions of which of these changes in the process Show Answer

Q80) The velocity of a bullet is reduced from 200m/s to 100m/s while travelling through a wooden block of thickness 10cm. The retardation, assuming it to be uniform, will be Show Answer

Q81) A body of 5 kg is moving with a velocity of 20 m/s. If a force of 100N is applied on it for 10s in the same direction as its velocity, what will now be the velocity of the body Show Answer

Q82) The path of a particle moving under the influence of a force fixed in magnitude and direction is Show Answer

Q83) A car, moving with a speed of 50 km/hr, can be stopped by brakes after at least 6m. If the same car is moving at a speed of 100 km/hr, the minimum stopping distance is Show Answer

Q84) The displacement of a particle is proportional to the cube of time elapsed. How does the acceleration of the particle depends on time obtained Show Answer

Q85) A body is moving with uniform acceleration describes 40 m in the first 5 sec and 65 m in next 5 sec. Its initial velocity will be Show Answer

Q86) A body starting from rest moves with constant acceleration. The ratio of distance covered by the body during the 5th sec to that covered in 5 sec is Show Answer

Q87) What determines the nature of the path followed by the particle Show Answer

Q88) A boat moves with a speed of 5 km/h relative to water in a river flowing with a speed of 3 km/h and having a width of 1 km. The minimum time taken around a round trip is Show Answer

Q89) For a body moving with relativistic speed, if the velocity is doubled, then Show Answer

Q90) A train is moving towards east and a car is along north, both with same speed. The observed direction of car to the passenger in the train is Show Answer

Q91) A body falls freely from rest. It covers as much distance in the last second of its motion as covered in the first three seconds. The body has fallen for a time of Show Answer

Q92) A stone is dropped into water from a bridge above the water. Another stone is thrown vertically downward 1 sec later. Both strike the water simultaneously. What was the initial speed of the second stone Show Answer

Q93) An iron ball and a wooden ball of the same radius are released from the same height in vacuum. They take the same time to reach the ground. The reason for this is Show Answer

Q94) A body is thrown vertically upwards. If air resistance is to be taken into account, then the time during which the body rises is Show Answer

Q95) A ball P is dropped vertically and another ball Q is thrown horizontally with the same velocities from the same height and at the same time. If air resistance is neglected, then Show Answer

Q96) A body is released from a great height and falls freely towards the earth. Another body is released from the same height exactly one second later. The separation between the two bodies, two seconds after the release of the second body is Show Answer

Q97) A stone dropped from the top of the tower touches the ground in 4 sec. The height of the tower is about Show Answer

Q98) Two stones of different masses are dropped simultaneously from the top of a building Show Answer

Q99) A stone is dropped from a certain height which can reach the ground in 5 second. If the stone is stopped after 3 second of its fall and then allowed to fall again, then the time taken by the stone to reach the ground for the remaining distance is Show Answer

Q100) Water drops fall at regular intervals from a tap which is 5m above the ground. The third drop is leaving the tap at the instant the first drop touches the ground. How far above the ground is the second drop at that instant Show Answer

Q101) A body starts to fall freely under gravity. The distances covered by it in first, second and third second are in ratio Show Answer

Q102) A body sliding on a smooth inclined plane requires 4 seconds to reach the bottom starting from rest at the top. How much time does it take to cover one-fourth distance starting from rest at the top Show Answer

Q103) A ball is dropped downwards. After 1 second another ball is dropped downwards from the same point. What is the distance between them after 3 seconds Show Answer

Q104) A stone is thrown with an initial speed of 4.9 m/s from a bridge in vertically upward direction. It falls down in water after 2 sec. The height of the bridge is Show Answer

Q105) A stone is shot straight upward with a speed of 20 m/sec from a tower 200 m high. The speed with which it strikes the ground is approximately Show Answer

Q106) A body freely falling from the rest has a velocity ‘v’ after it falls through a height ‘h’. The distance it has to fall down for its velocity to become double, is Show Answer

Q107) Velocity of a body on reaching the point from which it was projected upwards, is Show Answer

Q108) A body is thrown vertically up from the ground. It reaches a maximum height of 100m in 5sec. After what time it will reach the ground from the maximum height position Show Answer

Q109) A body thrown vertically upwards with an initial velocity reaches maximum height in 6 seconds. The ratio of the distances travelled by the body in the first second and the seventh second is Show Answer

Q110) A body, thrown upwards with some velocity, reaches the maximum height of 20m. Another body with double the mass thrown up, with double initial velocity will reach a maximum height of Show Answer

Q111) A particle when thrown, moves such that it passes from same height at 2 and 10s, the height is Show Answer

Q112) Two balls A and B of same masses are thrown from the top of the building. A, thrown upward with velocity V and B, thrown downward with velocity V, then Show Answer

Q113) A body falls from a height h = 200m (at New Delhi). The ratio of distance travelled in each 2 sec during t = 0 to t = 6 second of the journey is Show Answer

Q114) Two balls are dropped from heights h and 2h respectively from the earth surface. The ratio of time of these balls to reach the earth is Show Answer

Q115) The acceleration due to gravity on the planet A is 9 times the acceleration due to gravity on planet B. A man jumps to a height of 2m on the surface of A. What is the height of jump by the same person on the planet B Show Answer

Q116) A ball is released from the top of a tower of height h meters. It takes T seconds to reach the ground. What is the position of the ball in T/3 seconds Show Answer

Q117) Two balls of same size but the density of one is greater than that of the other are dropped from the same height, then which ball will reach the earth first (air resistance is negligible) Show Answer

Q118) If a freely falling body travels in the last second a distance equal to the distance travelled by it in the first three second, the time of the travel is Show Answer

Q119) The effective acceleration of a body, when thrown upwards with acceleration a will be : Show Answer

Q120) A body, thrown upwards with some velocity reaches the maximum height of 50 m. Another body with double the mass thrown up with double the initial velocity will reach a maximum height of Show Answer

Q121) From the top of a tower two stones, whose masses are in the ratio 1 : 2 are thrown one straight up with an initial speed u and the second straight down with the same speed u. Then, neglecting air resistance Show Answer

Q122) An object start sliding on a frictionless inclined plane and from same height another object start falling freely Show Answer

Q123) A ball is projected upwards from a height above the surface of the earth with velocity . The time at which the ball strikes the ground is Show Answer

Q124) A particle is dropped vertically from rest from a height. The time taken by it to fall through successive distances of 1 m each will then be Show Answer

Q125) If a ball is thrown vertically upwards with speed , the distance covered during the last t seconds of its ascent is Show Answer

Q126) Velocity-time curve for a body projected vertically upwards is Show Answer

Q127) Which of the following graph represents uniform motion Show Answer

Q128) The area under acceleration-time graph gives Show Answer

Q129) A ball is thrown vertically upwards. Which of the following plots represents the speed-time graph of the ball during its height if the air resistance is not ignored Show Answer

Q130) Which graph represents the uniform acceleration Show Answer

Q131) Which of the following velocity-time graphs shows a realistic situation for a body in motion Show Answer

Q132) Which of the following velocity-time graphs represent uniform motion Show Answer

Q133) Assertion : A body can have acceleration even if its velocity is zero at a given instant of time.
Reason :A body is momentarily at rest when it reverses its direction of motion.
Show Answer

Q134) Assertion : Two balls of different masses are thrown vertically upward with same speed. They will pass through their point of projection in the downward direction with the same speed.
Reason : The maximum height and downward velocity attained at the point of projection are independent of the mass of the ball.
Show Answer

Q135) Assertion :If the displacement of the body is zero, the distance covered by it may not be zero.
Reason :Displacement is a vector quantity and distance is a scalar quantity.
Show Answer

Q136) Assertion : The average velocity of the object over an interval of time is either smaller than or equal to the average speed of the object over the same interval.
Reason :Velocity is a vector quantity and speed is a scalar quantity.
Show Answer

Q137) Assertion : An object can have constant speed but variable velocity.
Reason :Speed is a scalar but velocity is a vector quantity.
Show Answer

Q138) Assertion : The speed of a body can be negative.
Reason :If the body is moving in the opposite direction of positive motion, then its speed is negative.
Show Answer

Q139) Assertion : The position-time graph of a uniform motion in one dimension of a body can have negative slope.
Reason :When the speed of body decreases with time, the position-time graph of the moving body has negative slope.
Show Answer

Q140) Assertion : A positive acceleration of a body can be associated with a ‘slowing down’ of the body.
Reason :Acceleration is a vector quantity.
Show Answer

Q141) Assertion : A negative acceleration of a body can be associated with a ‘speeding up’ of the body.
Reason :Increase in speed of a moving body is independent of its direction of motion.
Show Answer

Q142) Assertion : When a body is subjected to a uniform acceleration, it always move in a straight line.
Reason :Straight line motion is the natural tendency of the body.
Show Answer

Q143) Assertion :Rocket in flight is not an illustration of projectile.
Reason :Rocket takes flight due to combustion of fuel and does not move under the gravity effect alone. Show Answer

Q144) Assertion : The average speed of a body over a given interval of time is equal to the average velocity of the body in the same interval of time if a body moves in a straight line in one direction.
Reason :Because in this case distance travelled by a body is equal to the displacement of the body.
Show Answer

Q145) Assertion : Position-time graph of a stationary object is a straight line parallel to time axis.
Reason :For a stationary object, position does not change with time.
Show Answer

Q146) Assertion : The slope of displacement-time graph of a body moving with high velocity is steeper than the slope of displacement-time graph of a body with low velocity.
Reason :Slope of displacement-time graph = Velocity of the body.
Show Answer

Q147) Assertion : Distance-time graph of the motion of a body having uniformly accelerated motion is a straight line inclined to the time axis.
Reason :Distance travelled by a body having uniformly accelerated motion is directly proportional to the square of the time taken.
Show Answer

Q148) Assertion : A body having non-zero acceleration can have a constant velocity.
Reason :Acceleration is the rate of change of velocity.
Show Answer

Q149) Assertion : A body, whatever its motion is always at rest in a frame of reference which is fixed to the body itself.
Reason :The relative velocity of a body with respect to itself is zero.
Show Answer

Q150) Assertion : Displacement of a body may be zero when distance travelled by it is not zero.
Reason :The displacement is the longest distance between initial and final position.
Show Answer

Q151) .Assertion : The equation of motion can be applied only if acceleration is along the direction of velocity and is constant.
Reason :If the acceleration of a body is constant then its motion is known as uniform motion.
Show Answer

Q152) Assertion : A bus moving due north takes a turn and starts moving towards east with same speed. There will be no change in the velocity of bus.
Reason :Velocity is a vector-quantity.
Show Answer

Q153) Assertion : The relative velocity between any two bodies moving in opposite direction is equal to sum of the velocities of two bodies.
Reason :Sometimes relative velocity between two bodies is equal to difference in velocities of the two. Show Answer

Q154) Assertion : The displacement-time graph of a body moving with uniform acceleration is a straight line.
Reason :The displacement is proportional to time for uniformly accelerated motion.
Show Answer

Q155) Assertion : Velocity-time graph for an object in uniform motion along a straight path is a straight line parallel to the time axis.
Reason :In uniform motion of an object velocity increases as the square of time elapsed.
Show Answer

Q156) Assertion : A body may be accelerated even when it is moving uniformly.
Reason :When direction of motion of the body is changing then body may have acceleration.
Show Answer

Q157) Assertion : A body falling freely may do so with constant velocity.
Reason :The body falls freely, when acceleration of a body is equal to acceleration due to gravity.
Show Answer

Q158) Assertion : Displacement of a body is vector sum of the area under velocity-time graph.
Reason :Displacement is a vector quantity.
Show Answer

Q159) Assertion : The position-time graph of a body moving uniformly is a straight line parallel to position-axis.
Reason :The slope of position-time graph in a uniform motion gives the velocity of an object.
Show Answer

Q160) Assertion : The average speed of an object may be equal to arithmetic mean of individual speed.
Reason :Average speed is equal to total distance travelled per total time taken.
Show Answer

Q161) Assertion : The average and instantaneous velocities have same value in a uniform motion.
Reason :In uniform motion, the velocity of an object increases uniformly.
Show Answer

Q162) Assertion : The speedometer of an automobile measure the average speed of the automobile.
Reason :Average velocity is equal to total displacement per total time taken.
Show Answer

Q163) The maximum vertical height to which a man can throw a ball is 136 m. The maximum horizontal distance upto which he can throw the same ball is Show Answer

Q164) The range of the projectile projected at an angle of 15° with horizontal is 50 m. If the projectile is projected with same velocity at an angle of 45° with horizontal, then its range will be Show Answer

Q165) Two projectiles are projected at 30° and 60° with the horizontal with the same speed. The ratio of the maximum height attained by the two projectiles
respectively is Show Answer

Q166) Two projectiles are thrown with same initial velocity making an angle of 45° and 30° with the horizontal, respectively. The ratio of their respective ranges will be Show Answer

Q167) Two projectiles thrown at 30° and 45° with the horizontal respectively, reach the maximum height in same time. The ratio of their initial velocities is Show Answer

Q168) A helicopter is flying horizontally with a speed y at an altitudeh has to drop a food packet for a man on the groun(d) What is the distance of helicopter from the man when the food packet is dropped? Show Answer

Q169) A bomb is dropped by fighter plane flying horizontally. To an observer sitting in the plane, the trajectory of the bomb is a Show Answer

Q170) Two guns A and B can fire bullets at speeds 1 km/s
and 2 km/s, respectively. From a point on a horizontal ground, they are fired in all possible directions. The ratio of maximum areas covered by the bullets on the ground fired by the two guns is Show Answer

Q171) A boy can throw a stone upto a maximum height of 10 m. The maximum horizontal distance that the boy can throw the same stone upto will be Show Answer

Q172) A particle has an initial velocity 3i+4j and an acceleration of 0.4 i +03 j. Its speed after 10 s is Show Answer