ECAT Pre Computer Science Chapter 5 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 5 Circular Motion

Try The MCQ's Test For ECAT Physics Chapter 5 Circular Motion

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ECAT Physics Chapter 5 Circular Motion

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Question # 1

Direction of motion_______ in circular of motion:

Question # 2

One radian is:

Question # 3

An axis of rotation

Question # 4

One radian is

Question # 5

A body can have constant velocity when it follows:

Question # 6

The instantaneous acceleration of a body moving with constant speed in a circle:

Question # 7

______ plays the same role during angular motion as played by the mass in linear motion

Question # 8

Centripetal acceleration is also called ________ acceleration

Question # 9

In rotational motion, analogue of force F us called:

Question # 10

The center of mass of a sphere lies at:

Question # 11

Einstein's theory about gravity if better than Newton's because it gave explanation of:

Question # 12

Formula for calculating moment of inertia of the bodies of one pair is same. Tick the answer.

Question # 13

A rotating wheel accelerates up to the value of 0.75 rev/sec2after 2 seconds of its start. Its angular velocity becomes:

Question # 14

Angular momentum is a:

Question # 15

One radian is:

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ECAT Physics Chapter 5 Important MCQ's

Sr.# Question Answer
1 Direction of motion ______ in circular motion:
A. Changes off and on
B. Changes continuously
C. Does not change
D. None of them
2 If a gymnast is sitting on a rotating stool with his arms outstretched, brings his arms towards the chest, then its angular velocity will:
A. Increase
B. Decrease
C. Remains constant
D. None of these
3 Einstein's theory about gravity if better than Newton's because it gave explanation of:
A. Inverse square law
B. Bending of light
C. Both A and B
D. None of above
4 The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 9.8 m sec-2comes out to be
A. 980 N
B. 580 N
C. 1380 N
D. Zero
5 The instantaneous acceleration of a body moving with constant speed in a circle:
A. Remains constant
B. Is called centripetal acceleration
C. Tangential acceleration
D. None of these
6 A rotating wheel accelerates up to the value of 0.75 rev/sec2after 2 seconds of its start. Its angular velocity becomes:
A. 9.42 rad/sec
B. 2.6 rev/sec
C. 1.5 rev/sec
D. Both A and C
7 The rear wheels of an automobile are rev/sec which is reduced to 38 rad/sec in 5 seconds when brakes are applied. Its angular acceleration is:
A. 5 rad/sec2
B. -10 rav/sec2
C. -10 rad/sec2
D. -5 rav/sec2
8 Final velocity of a hoop is __________ the final velocity of a disc having same mass and radius on coming down an inclined plane.
A. Greater than
B. smaller than
C. Equal to
D. None of these
9 If a gymnast sitting on a rotating stool with his arms outstretched, brings his arms towards the chest, then its angular velocity will
A. Increase
B. Decrease
C. Remain constant
D. None of these
10 A car is turning around a corner at 10 m/sec as it travels along an arc of a circle. If value of centripetal acceleration is 10 m/sec2in this case, find radius of the circular path:
A. 1 m
B. 5 m
C. 10 m
D. 15 m

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