Question # 1

The value of of 'g' at the centre of the earth is

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Infinite

2 g

3 g

zero

Close orbiting satellites orbit the earth at a height of about

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400 km

4000 km

400 m

400 cm

Angular velocity determines, How fast or, How slow a body is

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Accelerating

Vibrating

Rotating

Oscillating

Angular momentum has the same unit as

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Impulse x distance

Power x time

Linear x time

work x frequency

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 diver spins faster when moment of inertia becomes.

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smaller

Greater

Constant

Zero

The value of a time period of allow flying satellite is

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1 year

84 minutes

28 hours

1 day

Centripetal force perform

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Maximum work

Minimum work

Negative work

No work

Which is unimportant in describing the satellites orbit.

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Distance of satellite from earth's center

Gravitational constant G

Mass of satellite

Mass of earth

The maximum velocity necessary to put a satellite into orbit is

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7.1 kms-1

7.3 kms-1

7.9 kms-1

8,9 kms-1

In rotational motion the torque is equal to rate of change of

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Angular velocity

Linear momentum

Angular momentum

Angular acceleration

The diver spin faster when moment of inertia becomes.

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smaller

Greater

Constant

Equal

In rotational motion the analogous of mass is

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Angular acceleration

Torque

Moment of inertia

Angular momentum

In case of planets centripetal force is provided by

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Coulomb's force

Electrostatic force

Gravitational force

Magnetic force

The direction of angular acceleration is

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Along the axis of rotation

Perpendicular to the axis of rotation

Opposite to axis of rotation

None of these

When a body is whirled in a horizontal circle by means of string, the centripetal force is supplied by

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Mass of body

Velocity of a body

Tension in the string

Centripetal acceleration

The dimensions of angular velocity are

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[LT-1]

[LT-2]

[T-1]

[L-1T-1]

the angular version of F= ma is

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L = 1w

pi = 1a

l = pi a

f = mv/t

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