Question # 1

Which of the following pairs does not have identical dimensions?

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Torque and energy

Energy and work

Momentum and impulse

Mass and moment of inertia

Direction of motion _______ in circular motion

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Changes off and on

Changes continuously

Does not change

None of them

One radian is:

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Greater than one degree

Less than one degree

Equal to one degree

None of them

Conventional the angular Velocity is Directed at an angle of:

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90° to the axis of rotation

30° to the axis of rotation

0° to the axis of rotation

None of above

Angular velocity is a:

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Scalar quantity

Vector quantity

Complex quantity

None of these

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

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0.05 m

0.08 cm

0.8 m

0.008 m

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:

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38 m/sec

3.8 m/sec

0.6 m/sec

None of these

Moment of linear momentum is called.

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Moment arm

Moment of inertia

Inertia

Angular momentum

Direction of motion _________ in circular motion

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Changes off and on

Changes continously

Does not change

None of them

A rotating wheel accelerates up to the value of 0.75 rev/sec²after 2 seconds of its start. Its angular velocity becomes:

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9.42 rad/sec

2.6 rev/sec

1.5 rev/sec

Both A and C

Direction of motion_______ in circular of motion:

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Changes off and on

Changes continuously

Does not change

None of them

Einstein's theory about gravity if better than Newton's because it gave explanation of:

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Inverse square law

Bending of light

Both A and B

None of above

Final velocity of a hoop is __________ the final velocity of a disc having same mass and radius on coming down an inclined plane.

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Greater than

smaller than

Equal to

None of these

The angular speed of a particle moving along a circular path is 5 Pie rad sec^-1, Its period of motion is:

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2.5 sec

0.06 sec

15.7 sec

0.4 sec

When angular acceleration is positive, the body rotates:

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Slower

Slowest

Faster

None of these

Direction of motion ______ in circular motion:

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Changes off and on

Changes continuously

Does not change

None of them

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ECAT Physics Chapter 5 Circular Motion Online Test MCQs With Answers

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