ECAT Pre Engineering Physics Chapter 5 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 5 Circular Motion

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

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Physics ECAT Pre Engineering Chapter 5 Circular Motion

00:00
Question # 1

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

Question # 2

Moment of inertia depends upon:

Question # 3

Angular momentum is a:

Question # 4

A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be:

Question # 5

The center of mass of a sphere lies at:

Question # 6

A toy car moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed V of the car is:

Question # 7

If a gymnast is sitting on a rotating stool with his arms outstretched, brings his arms towards the chest, then its angular velocity will:

Question # 8

Moment of linear momentum is called.

Question # 9

The useful unit of angular replacement in SI unit is:

Question # 10

When a body is moves along a circular path with constant speed, it has an acceleration, which is always directed:

Question # 11

Direction of motion _________ in circular motion

Question # 12

When angular acceleration is positive, the body rotates:

Question # 13

The number of "Earth stations" which transmit signals to satellites and receive signals from them are:

Question # 14

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 0.8 m sec-2comes out to:

Question # 15

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:

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ECAT Physics Chapter 5 Important MCQ's

Sr.# Question Answer
1 Centripetal acceleration is also called _______ acceleration:
A. Tangential
B. Radial
C. Angular
D. None of them
2 A stone tied to the end of a 20 cm long string is whirled in a horizontal circle. If centripetal acceleration is 9.8 m/sec2, then its angular velocity is rad/sec is:
A. 22/7
B. 7
C. 14
D. 21
3 In rotational motion, analogue of force F us called:
A. Couple
B. Torque
C. Mass
D. Moment of intertia
4 Direction of motion_______ in circular of motion:
A. Changes off and on
B. Changes continuously
C. Does not change
D. None of them
5 Direction of motion _______ in circular motion
A. Changes off and on
B. Changes continuously
C. Does not change
D. None of them
6 The rear wheels of an automobile are rotating with an angular velocity of 14 rev/sec which is reduced to 38 rad/sec in 5 second when brakes are applied. Its angular acceleration is:
A. 5 rad/sec2
B. -10 rev/sec2
C. -10 rad/sec2
D. -5 rev/sec2
7 When body moves along a circular path with constant speed, it has an acceleration, which is always directed;
A. Along the tangent
B. Towards the centre
C. Away from the centre
D. None of them
8 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
9 Formula for calculating moment of inertia of the bodies of one pair is same. Tick the answer.
A. Disc, sphere
B. sphere, hoop
C. Thin rod, hoop
D. Hoop,disc
10 A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be:
A. 49 rad/sec2
B. 1 rad/sec2
C. 0.16 rev/sec2
D. Both A and C

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  • Ahmed Qureshi

    Ahmed Qureshi

    14 Feb 2018

    wt

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