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

Suppose the water flows out from a pipe at 3kg s-1and its velocity changes from 5m s-1to zero on striking the wall, then the force exerted by water on wall will be

Question # 2

The mass of a body measured by a physical balance in a lift at rest is found to be m, if the lift is going up with an acceleration a, its mass will be measured as

Question # 3

If a ball comes back to its starting point after bouncing off the wall several times, then its

Question # 4

Acceleration of a body at any particular instant during its motion is known as

Question # 5

The entity which measures the quantity of motion in a body is called

Question # 6

An object is dropped from a height of 100 m. Its velocity at the moment it touches the ground is:

Question # 7

Which of the following statements for an object in equilibrium is not true?

Question # 8

An inertial frame of reference is that frame of reference in which

Question # 9

A change in position of a body from its initial position to its final position is known as

Question # 10

When a horse pulls a cart, the force that makes the horse run forward is the force exerted by

Question # 11

Velocity of a body changes if

Question # 12

The dimension of linear inertia is:

Question # 13

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

Question # 14

A stone is dropped from rest from the top of a tower 19.6 m high. The distance traveled during the last second of its fall is (giving g=9.8 m/ss)

Question # 15

Flight of rocket in the space is an example of

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 A the top of the trajectory of a projectile, the directions of its velocity and acceleration are
A. Perpendicular to each other
B. Parallel to each other
C. Inclined to each other at an angle of 45°
D. Anitparallel to each other
2 A monkey sits on the pan of spring scale kept in an elevator. The reading of the spring scale will be maximum when
A. Elevator is stationary
B. Elevator cable breaks and it falls freely towards earth
C. Elevator accelerates downwards
D. Elevator accelerates upward
3 When a shell explodes in mid-air, its fragments fly off in
A. only one direction
B. in two direction
C. different directions
D. a particular direction
4 The quantity F x t is called as
A. momentum
B. velocity
C. acceleration
D. impulse
5 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
6 A body starting from rest covers a distance of 0.45 Km and acquires a velocity of 300 Kmh-1. its acceleration will be
A. 7.71 m s-2
B. 0.5m s-2
C. 0.15m s-2
D. 0.092m s-2
7 In the above figures, tell which set is graphs shows that a body is moving uniform velocity:
A. (i) and (ii)
B. (ii) and (iii)
C. (i) and (iii)
D. (ii) and (iv)
8 Acceleration produced in a body by a force varies
A. inversely as the applied force
B. directly as the applied force
C. directly as the mass of the body
D. none of them
9 In the expression F x t, the force F is
A. total force
B. instantaneous force
C. average force
D. all of them
10 The three equation of motions are useful only for
A. linear motion with increasing acceleration
B. line motion with uniform acceleration
C. linear motion with zero acceleration
D. linear motion with varying acceleration

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