ECAT Pre Engineering Physics Chapter 3 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 3 Motion and Force

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Physics ECAT Pre Engineering Chapter 3 Motion and Force

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Question # 1

When a bicycle is in motion, the frictional forces exerted by the ground are

Question # 2

A car travels first half distance between two places with a speed of 30 km/h and remaining half with a speed of 50 km/h. The average speed of the car is

Question # 3

A ball is dropped from a height of 4.2 meters. To what height will take it rise if there is no loss of KE after rebounding?

Question # 4

The magnitude of the displacement is a line from initial position to final position which is

Question # 5

When a shell explodes in mid-air, its fragments fly off in

Question # 6

The direction of velocity is along the direction of

Question # 7

A body is dropped from a tower with zero velocity, reaches ground in 4s. The height of the tower is about

Question # 8

A 5 kg mass is falling freely, the force acting on, it will be

Question # 9

A force of 50 dynes is acted on a body of mass 5 g which is at rest, for an interval of 3 seconds, then impulse is

Question # 10

If the objects of different masses move with the same velocity, then it is more difficult to stop the

Question # 11

A vehicle of mass 120 kg is moving with a uniform velocity of 108 km/h. The force required to stop the vehicle in 10s is

Question # 12

At the top of the trajectory of a projectile the acceleration is

Question # 13

When the mass of the colliding body is much larger than the mass of the body at rest, its velocity after collision.

Question # 14

A body of weight 1 N has a kinetic energy of 1 joule when its speed is:

Question # 15

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 seconds then the average acceleration during contact is

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 When the mass of the colliding body is much larger than the mass of the body at rest, its velocity after collision.
A. Becomes half
B. Becomes zero
C. Ramains same
D. Becomes double
2 If the velocity of the body decreases non-uniformly then the slope of the velocity-time graph will have
A. different values
B. same values
C. zero valves
D. constant valves
3 The slopes of the tangent at any point on the curve gives the value of the
A. average velocity at that point
B. instantaneous velocity at that point
C. average acceleration at that point
D. instantaneous acceleration at that point
4 In velocity of a particle at an instant is 10 m/s and after 5s the velocity of the particle is 20 m/s. The velocity 3s before in m/s is
A. 8
B. 4
C. 6
D. 7
5 Rate of change of momentum is called
A. Impulse
B. Force
C. Torque
D. Momentum
6 When a body is moving with uniform positive acceleration, the velocity- time graph is a straight line. Its slope is
A. zero
B. negative
C. positive
D. non-existing
7 Body which falls freely under gravity provides good example of motion under:
A. Uniform acceleration
B. Non-uniform acceleration
C. Uniform velocity
D. None of these
8 According to the law of conservation of linear momentum, the total linear momentum of an isolated system
A. increases
B. decreases with time
C. remains constant
D. none of them
9 A body is moving with constant velocity of 10 m/sec in the north-east direction. Then its acceleration will be:
A. 10 m/sec2
B. 20 m/sec2
C. 30 m/sec2
D. Zero
10 In the expression F x t, the force F is
A. total force
B. instantaneous force
C. average force
D. all of them

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