Question # 1

Moment of linear momentum is called.

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Moment arm

Moment of inertia

Inertia

Angular momentum

Moment of inertia depends upon:

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Mass

Selection of axis of rotation

Both of them

None of these

A body can have constant velocity when it follows:

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A circular path

A rectilinear path

Trajectory of a projectile

None of these

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

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Along the tangent

Toward the centre

Away from the centre

None of them

One radian is

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Greater than one degree

Less than one degree

Equal to one degree

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

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

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49 rad/sec²

1 rad/sec²

0.16 rev/sec²

Both A and C

Both B and C

Which one is related to angular motion:

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Moment of a force

Moment of inertia

Moment of momentum

None of these

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

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Increase

Decrease

Remain constant

None of these

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

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Disc, sphere

sphere, hoop

Thin rod, hoop

Hoop,disc

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

Direction of motion_______ in circular of motion:

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Changes off and on

Changes continuously

Does not change

None of them

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 equal to:

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30.3°

45.3°

50.3°

57.3°

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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22/7

7

14

21

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:

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38 m/sec

3.8 m/sec

0.6 m/sec

None of these

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