Question # 1

If a rocket is accelerating upward with an acceleration of 2 g, an astronaut of weight, mg in the rocket shows apparent weight.

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Zero

Mg

2 mg

3 mg

The largest satellite system is managed by

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116 countries

126 countries

136 countries

140 countries

Which one of the following is into directed along the axis of rotation

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Angular acceleration

Angular momentum

Centripetal acceleration

Angular displacement

A man weight 1000 N in a stationary lift. If the lift moves up with an acceleration of 10 ms-2. then its weight becomes.

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1000 N

2000 N

3000 N

0 N

The work done by centripetal force is

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(-)ve

(+)ve

Maximum

Zero

The artificial satellites are held in orbits by

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Gravitational force

Electric force

Magnetic force

All 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 equations of angular motion hold only in case when the axis of rotation is

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Moving

Fixed

Both a and b

None of these

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

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

The relation between linear and angular velocity is

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The relation between the speed and hoop can be written as

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2

4

1/2

1/4

The angle between circumference of a circle and center is

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For angular momentum of system to remain constant, external torque should be.

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Small

Large

Zero

None

100 radians are equal to.

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57.3^o

75.3^o

573^o

5730^o

Satellites are the objects that orbit around the

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Moon

Sun

Earth

Star

The SI unit of angular momentum is

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J.S-2

J.S-1

J.S

J.m

The weight of the body at the centre of earth is

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Maximum

Minimum

Zero

Infinite

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