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 point on the rim of a wheel moves 0.2 m when the wheel turns through an angle of 14.3 degrees. The radius of the wheel is:

Question # 2

Centripetal acceleration is also called ________ acceleration

Question # 3

Which one is related to angular motion:

Question # 4

Direction of motion ______ in circular motion:

Question # 5

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:

Question # 6

A point on the rim of a wheel moves 0.2 m where the wheel turns through an angle is 14.3 degrees. The radius of the wheel is:

Question # 7

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

Question # 8

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 # 9

Centripetal acceleration is also called ______ acceleration

Question # 10

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

Question # 11

Centripetal force performs:

Question # 12

Centripetal acceleration is also called ______ acceleration:

Question # 13

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

Question # 14

Direction of motion _________ in circular motion

Question # 15

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:

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ECAT Physics Chapter 5 Important MCQ's

Sr.# Question Answer
1 When angular acceleration is positive, the body rotates:
A. Slower
B. Slowest
C. Faster
D. None of these
2 INTELSAT operates at frequencies 4, 6, 11, 14 having unit of:
A. KHz
B. MHz
C. GHz
D. BHz
3 A point on the rim of a wheel moves 0.2 m where the wheel turns through an angle is 14.3 degrees. The radius of the wheel is:
A. 0.05 m
B. 0.08 m
C. 0.8 m
D. 0.008 m
4 Which of the following pairs does not have identical dimensions?
A. Torque and energy
B. Energy and work
C. Momentum and impulse
D. Mass and moment of inertia
5 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
6 Radian is defined as the angle subtended at the center of a circle by an arc of:
A. Length equal to its diameter
B. Length equal to its radius
C. Any length
D. None of these
7 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
8 When a body is moves along a circular path with constant speed, it has an acceleration, which is always directed:
A. Along the tangent
B. Toward the centre
C. Away from the centre
D. None of them
9 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
10 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

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