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

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

Question # 2

Direction of motion _________ in circular motion

Question # 3

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

Question # 4

INTELSAT operates at frequencies 4, 6, 11, 14 having unit of

Question # 5

Angular velocity is a:

Question # 6

One radian is equal to:

Question # 7

Centripetal acceleration is also called ________ acceleration

Question # 8

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 # 9

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:

Question # 10

Centripetal acceleration is also called _______ acceleration:

Question # 11

The center of mass of a sphere lies at:

Question # 12

A car is 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 # 13

In rotational motion, analogue of force F us called:

Question # 14

One radian is:

Question # 15

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

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ECAT Physics Chapter 5 Important MCQ's

Sr.# Question Answer
1 A body moving along the circumference of a circle of radius R completes one revolution. The radius of a covered path to the angle subtended at the centre is:
A. Radius of the circle
B. Twice the radius
C. Thrice the radius
D. None of these
2 When angular acceleration is positive, the body rotates:
A. Slower
B. Slowest
C. Faster
D. None of these
3 The number of "Earth stations" which transmit signals to satellites and receive signals from them are:
A. 3
B. 24
C. 126
D. 200
4 A car is turning around a corner at 10 m/sec as it travels along an arc of 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
5 When an object moves with a uniform angular velocity, then its instantaneous angular velocity is equal to:
A. Zero
B. Its average velocity
C. Its angular displacement
D. None of these
6 A body can have constant velocity when it follows:
A. A circular path
B. A rectilinear path
C. Trajectory of a projectile
D. None of these
7 A stone is tied to the end of a 20 cm along string is whirled in a horizontal circle.
if centripetal acceleration is 9.8 m/sec2, then its angular velocity in rad/sec is:
A. 22/7
B. 7
C. 14
D. 21
8 Direction of motion _______ in circular motion
A. Changes off and on
B. Changes continuously
C. Does not change
D. None of them
9 One radian is:
A. Greater than one degree
B. Less than one degree
C. Equal to one degree
D. None of these
10 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

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