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 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 # 2

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:

Question # 3

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

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

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:

Question # 6

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

Question # 7

Which of the following pairs does not have identical dimensions?

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

Centripetal acceleration is also called _______ acceleration:

Question # 12

One radian is

Question # 13

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

Question # 14

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

Question # 15

Moment of linear momentum is called.

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ECAT Physics Chapter 5 Important MCQ's

Sr.# Question Answer
1 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
2 Centripetal force performs:
A. Maximum work
B. Negative work
C. Positive work
D. None of these
3 Conventionally the angular velocity is directed to an angle of:
A. 90° to the axis of rotation
B. 30° to the axis of rotation
C. 0° to the axis of rotation
D. None of the above
4 Centripetal acceleration is also called ________ acceleration
A. Tangential
B. Radial
C. Angular
D. None of these
5 INTELSAT operates at frequencies 4, 6, 11, 14 having unit of:
A. KHz
B. MHz
C. GHz
D. BHz
6 The center of mass of a sphere lies at:
A. The axis of the sphere
B. Circumference of sphere
C. Center of the sphere
D. None of them
7 Circular motion is an example of motion in:
A. One dimension
B. Two dimensions
C. Three dimensions
D. None of these
8 An axis of rotation
A. Is a straight line
B. Is normal to the plane of rotation
C. Passes through pivot point O
D. All of them
9 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
10 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

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