Question 31 : The weight of a body is the gravitational force exerted on it?
1. By another body.
2. By the planet.
3. By the earth.
4. By the moon.
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Question 32 : G is called
1. gravitational force
2. gravitational attraction
3. accelaration due to gravity
4. gravitational constant
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Question 33 : Artificial gravity is produced in a space-craft to?
1. decrease the weight of the astronaut
2. increase the weight of the astronaut
3. overcome the force of friction
4. overcome the state of.weight-lessness.
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Question 34 : Above the surface of the earth if we go to distance equal to double the radius of the earth, the value of 'g' will become?
1. one-ninth
2. one-half
3. one-third
4. one-fourth
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Question 35 : "At the center of earth dt R, value of "g"?"
1. Will be zero.
2. Will remain constant.
3. Will be maximum.
4. Will be unity.
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Question 36 : The earth is not a perfect sphere, but it bulges at the?
1. Center
2. Poles
3. Equator
4. North Pole
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Question 37 : If a body is taken from a pole to the equator its distance from the center of the earth will?
1. Increases
2. Decreases
3. Constant
4. None of these.
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Question 38 : "If we go away from the surface of the earth a distance equal to the radius of earth the value of "g" becomes?"
1. One third.
2. One nine
3. One fourth.
4. One eight.
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Question 39 : A body released inside the spacecraft does not fall relative to it, and it appears to be?
1. Mass less.
2. Weightless
3. Heaviest
4. Lightest
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Question 40 : The earth's gravity acts on both the spacecraft and the bodies in it, giving each?
1. The same torque.
2. The same centrifugal acceleration.
3. The same acceleration.
4. Gravitational force.
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