(Set 2) Gravitation

1. its mass increase
2. its weight increases
3. its mass decreases
4. its mass remains unchanged

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1. the moon's surface is rough
2. the acceleration due to gravity in moon is smaller than that on the earth
3. the moon is cooler than earth
4. the moon has no atmosphere

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1. 10
2. 100
3. 1000
4. 10000

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1. revolves about the polar axis
2. has a time period less than that of the near earth satellite
3. moves faster than a near earth satellite
4. sense of rotation is from west to east

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1. zero at that place
2. balanced by the force of attraction due to moon
3. equal to the centripetal force
4. non-effective due to particular design of the satellite

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1. continue to move in this orbit with same velocity
2. move tangentially to the original orbit with the same velocity
3. become stationary in this orbit
4. move toward the earth

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1. Satellite is kept in orbit by remote control from ground station.
2. Satellite is kept in orbit by retro-rocket and solar energy keeps it moving around the earth.
3. Satellite requires energy from solar panels and solid fuels for orbiting.
4. Satellite does not required any energy for orbiting.

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1. lower orbit and its kinetic energy increases
2. higher orbit and its kinetic energy decreases
3. lower orbit and its kinetic energy decreases
4. higher orbit and its kinetic energy increases

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1. mass
2. angular momentum
3. kinetic energy
4. speed

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1. 2.8 km/s
2. 5.6 km/s
3. 11.2 km/s
4. 14 km/s

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1. 1,2 and 3
2. 1 and 2
3. 2 and 3
4. only 1

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