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

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

Question # 2

An axis of rotation

Question # 3

When an object moves with a uniform angular velocity, then its instantaneous angular velocity is equal to:

Question # 4

Conventionally the angular velocity is directed to an angle of:

Question # 5

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

Question # 6

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

Question # 7

When a body moves with a constant speed in a circle:

Question # 8

Moment of inertia depends upon:

Question # 9

Radian is defined as the angle subtended at the center of a circle by an arc of:

Question # 10

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

Question # 11

The number of countries who manage the largest satellite system is:

Question # 12

When angular acceleration is positive, the body rotates:

Question # 13

Circular motion is an example of motion in:

Question # 14

When angular acceleration is positive, the body rotates:

Question # 15

A body can have constant velocity when it follows:

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ECAT Physics Chapter 5 Important MCQ's

Sr.# Question Answer
1 ______ plays the same role during angular motion as played by the mass in linear motion
A. Torque
B. Angular Momentum
C. Moment of a force
D. Moment of inertia
2 The angular speed of a particle moving along a circular path is 5 Pie rad sec-1, Its period of motion is:
A. 2.5 sec
B. 0.06 sec
C. 15.7 sec
D. 0.4 sec
3 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
4 Moment of inertia depends upon:
A. Mass
B. Selection of axis of rotation
C. Both of them
D. None of these
5 A body moving along the circumference of a circle of radius R completes one revolution. The radius of the covered path to the angle subtended at the center is:
A. Radius of the circle
B. Twice the radius
C. Thrice the radius
D. None of these
6 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
7 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:
A. 38 m/sec
B. 3.8 m/sec
C. 0.6 m/sec
D. None of these
8 When a 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
9 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
10 A 1000 Kg car travelling with a speed of 90 km/hr turns around a curve of radius 0.1 km. The necessary centripetal force comes out to be:
A. 8.1 X 107N
B. 625 N
C. 6250 N
D. None of these

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