Practice Test

Q1) Select the WRONG one. Show Answer

Q2) The vector product of two non-zero vectors product is zero Show Answer

Q3) Two equal forces, acting at a point have resultant equal to either of the forces, the angle between them is Show Answer

Q4) In parallelogram law of vectors, the direction of resultant vector is given by Show Answer

Q5) Scalars are physical quantities which are completely specified by Show Answer

Q6) The velocity vector of a stationary particle is Show Answer

Q7) Which of the following is a scalar ? Show Answer

Q8) The vectors of the same quantity having same magnitude and same direction are called Show Answer

Q9) A single vector which produces the same effect of two or more vectors is called Show Answer

Q10) A vector is not changed if Show Answer

Q11) Which of the following quantities is a vector? Show Answer

Q12) Out of the following physical quantities which is NOT a scalar ? Show Answer

Q13) Which of the following is a scalar ? Show Answer

Q14) The magnitude of a vector can not be Show Answer

Q15) The process of finding the resultant of two or more vectors is called Show Answer

Q16) Choose the INCORRECT statement. Show Answer

Q17) Vector subtraction is Show Answer

Q18) Two equal forces acting at a point, at right angles to each other have a resultant of 14.14 N. The magnitude of each force is Show Answer

Q19) Three coplanar forces 100 N, 150 N and 200 N acting at a point and keeping the point in equilibrium are represented by the sides of a triangle. The sides will be respectively in the ratio Show Answer

Q20) The component of a vector may be Show Answer

Q21) The process of finding the components of a given vector is called as Show Answer

Q22) The resultant of two vectors will be maximum, if they are Show Answer

Q23) If the angular displacement is large, it is a scalar quantity because Show Answer

Q24) If the component of one vector in the direction of another vector is zero, then those two vectors are Show Answer

Q25) Law of polygon of vectors is a repeated use of Show Answer

Q26) Two vectors of different physical quantities can be _____ to obtain a scalar. Show Answer

Q27) Choose the WRONG statement. Show Answer

Q28) The scalar product of electric field intensity and area vector through which the line of force emerges is Show Answer

Q29) Choose the CORRECT statement. Show Answer

Q30) The magnitude of self cross product is Show Answer

Q31) The example of cross product is Show Answer

Q32) The example of dot product is Show Answer

Q33) Vectors are physical quantities which are completely specified by Show Answer

Q34) Which of the following is NOT essesential for three forces to produce zero resulatant ? Show Answer

Q35) The resultant of two vectors will be minimum if they are Show Answer

Q36) Magnetic flux linked with surface is Show Answer

Q37) The vector product of two vectors is a vector whose direction is given by
Show Answer

Q38) A ball is dropped from a bridge 122.5m high. After the ball has been falling for 2 sec another is thrown straight downwards after it. The initial velocity of the ball is such that they strike the water together. This velocity is : Show Answer

Q39) A stone falling from the top of a tower covers half of its height in the last second of its motion, the total height is : Show Answer

Q40) Two bodies are thrown up with initial velocities in the ratio of 2 : 5 . The ratio of the maximum heights reached by them is : Show Answer

Q41) A body is released from a certain height. Another is released from the same height one second later. The separation between the two bodies 2 second after the release of the second body is : Show Answer

Q42) The two ends of a train moving with a constant acceleration pass a certain point with velocities u and v . The velocity with which the middle point of train passes the same point is : Show Answer

Q43) When the speed of a car is v, the minimum distance in which it can be stopped is x . If the speed is made n times, what will be the minimum distance in which it can be stopped ? Show Answer

Q44) While travelling from one station to another a car travels 75 km north 60 km north-east and 20 km east. The distance between the two stations is : Show Answer

Q45) A man is at a distance x from the bus; when the bus begins to move with a constant acceleration 'a ' with what minimum velocity the man should run towards the bus so as to catch it ? Show Answer

Q46) A body starts from rest and moves with constant acceleration. The ratio of distance covered by the body in nth second to the distance covered in n seconds is : Show Answer

Q47) A ship travels downstream from point A to point B in two hours and upstream in three hours. Then the time that it will take a log of wood to cover the distance from A to B is : Show Answer

Q48) An athlete completes one round of a circular track of radius 'R' in 40 s . What will be his displacement at the end of 2 minutes 20 seconds ? Show Answer

Q49) A rubber ball is dropped from a height of 5 m on a planet where the acceleration due to gravity is not known. On bouncing it rises to a height of 1.8m . The ball loses its velocity on bouncing by a factor : Show Answer

Q50) A particle is dropped from rest vertically from a height. The time taken by it to fall through successive distances of 1zm each will then be : Show Answer

Q51) A ball falls on the surface from 10 m height and rebounds to 2.5 m . If the duration of contact with the floor is 0.01 sec. Then average acceleration during contact is : Show Answer

Q52) Two stones are thrown from the top of a tower, one straight down with an initial speed u and the second straight up with the same speed u. When the two stones hit the ground, they will have speeds in the ratio : Show Answer

Q53) A car starts from rest and moves with constant acceleration. The ratio of distance covered by the car in nth second to that covered in n second is : Show Answer

Q54) 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

Q55) A boy releases a ball from the top of a building. It will clear a window 2 m high at a distance 10 m below the top in nearly : Show Answer

Q56) 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

Q57) A ship travels downstream from point A to point B in two hours and upstream in three hours. Then the time that it will take a log of wood to cover the distance from point A and B is : Show Answer

Q58) Two bodies begin a free fall from rest, from the same height, 1 second apart. How long after the first body begins to fall will the two bodies be 10 m apart ? Show Answer

Q59) A rubber ball is dropped from a height of 5 metre on a plane where the acceleration due to gravity is not known. On bouncing, it rises to a height of 1.8 m . On bouncing, the ball loses its velocity by a factor of : Show Answer

Q60) A body starts from rest and travels a distance x with uniform acceleration , then it travels a distance 2x with uniform speed, finally it travels a distance 3x with uniform retardation and comes to rest. If the complete motion of the particle is along a straight line, then the ratio of the average velocity to maximum velocity is: Show Answer

Q61) The acceleration of a particle increases linearly with time t as '6t'. If the initial velocity of the particle is zero and the particle starts from the origin, then the distance travelled by the particles in time t will be : Show Answer

Q62) A body moving with uniform retardation covers 3 km before its speed is reduced to half its initial value. It comes to rest in another distance of : Show Answer

Q63) A ball is thrown vertically upward with a velocity u' from the balloon descending with velocity v. The ball will pass by the balloon after time : Show Answer

Q64) A 120 m long train is moving towards west with speed of 10 m / s. A bird flying towards east with a speed of 5 m / s crossed the train. The time taken by the bird to cross the train will be : Show Answer

Q65) If a ball thrown vertically upwards with speed u , the distance covered during the last t seconds of its ascent is : Show Answer

Q66) 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

Q67) A body falls from a height h = 200 m. The ratio of distance travelled in each 2 sec, during t = 0 to t = 6 second of journey is : Show Answer

Q68) A particle ( A ) is dropped from a height and another particle ( B ) is projected in horizontal direction with speed of 5 m / s from the same height, then correct statement is : Show Answer

Q69) A bullet losses 1 /20 of its velocity after penetrating a plank. How many planks are required to stop the bullet ? Show Answer

Q70) A ball is released from the top of a tower of height h metres. It takes T seconds to reach the ground. What is the position of the ball at T/3 second ? Show Answer

Q71) A body starting from rest moves with constant acceleration the ratio of distance covered by the body during the 5th second to that covered in the 8th second is : Show Answer

Q72) Two bodies A and B of masses 1 kg and 3 kg respectively are dropped from heights 16 m and 25 m. The ratio of the time taken by them to reach the ground is : Show Answer

Q73) A car accelerates from rest at constant rate for first 10 s and covers a distance ' x ' . It covers a distance ' y ' in next 10 s at the same acceleration. Which of the following is true ? Show Answer

Q74) A particle initially at rest moves along x - axis . It is subjected to an acceleration which varies with time according to the equation : a = 2 t + 5. Its velocity after 2 second will be : Show Answer

Q75) A man of 50 kg mass is standing in a gravity free space at a height of 10 m above the floor. He throws a stone of 0.5 kg mass downwards with a speed 2 m / s. When the stone reaches the floor, the distance of the man above the floor will be : Show Answer

Q76) A ball is dropped vertically from a height d above the ground. It hits the ground and bounces up vertically to a height d / 2 . Neglecting subsequent motion and air resistance, its velocity v varies with the height h above the ground as : Show Answer

Q77) A boat which has a speed of 5 k / m in still water crosses a river of width 1 km along the shortest possible path in 15 minutes. The velocity of the river water in km / h is : Show Answer

Q78) A ball is thrown vertically upwards. Which of the following plots represents the speed-time graph of the ball during its flight if the air resistance is not ignored ? Show Answer

Q79) Which of the following velocity - time graphs represent uniform motion ? Show Answer

Q80) Which of the following velocity - time graphs shows a realistic situation for a body in motion ? Show Answer

Q81) A boat man can row with a speed of 10 km / h in still water. If the river flows at 5 km / h , the direction in which the boat man should row to reach a point on the other bank directly opposite to the point from where he started is ( width of the river is 2 km ) : Show Answer