Question # 1

The unit of rotational K.E. is

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rAD/SEC

Js

J

Kgm2

The relation between the speed and hoop can be written as

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2

4

1/2

1/4

Weight of a 60 kg man in moving elevator with constant acceleration of 1/2 f

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Zero

300 N

600 N

200 N

The direction of angular velocity of along the

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Tangent at that point

Axis of rotation

Radius towards the centre

Radius away from the centre

Which of the following is not directed along the fixed axis of rotation.

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Angular displacement

Angular momentum

Centripetal acceleration

Angular acceleration

An elevator is moving up with an acceleration equal to 'g' An apparent weight of the body in an elevator is.

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Zero

Equal to real weight

2 mg

3 mg

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the height of the geostationary satellite above the equator is.

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35000 km

36000 km

34000 km

33000 km

Time rate of change of angular displacement is called

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Linear velocity

Angular velocity

Rotational velocity

Vibrational velocity

If a body is moving in the counter clockwise direction the direction of angular velocity will be

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Toward the centre

Away from the centre

along the linear velocity

Perpendicular to both radius and linear velocity

The value of a time period of allow flying satellite is

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1 year

84 minutes

28 hours

1 day

The relation between linear and angular velocity is

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A man of 1 kg is freefalling. The force of gravity is

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1 N

9.8 N

0.5 N

Zero

The weight of the body at the centre of earth is

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Maximum

Minimum

Zero

Infinite

When a body is moving along a circular path, then such a motion is called

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Vibratory motion

Rotatory motion

Linear motion

None of these

The amount of inertia of 10 kg hoop about the axis of rotation perpendicular to its plane having radius 5 m is

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50 kgm2

100 K gm2

150 K gm2

250 K gm2

The motion of a body moving along a circular path is called.

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Translational motion

Angular motion

Vibratory motion

Linear motion

A body rotating with angular velocity of 2 radian/s and linear velocity is also 2 ms-1, then radius of circle is.

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1 m

0.5 m

4 m

2 m

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