Question 41 : An artificial gravity can be created in the spacecraft ?
1. By rotating it around the earth.
2. By spinning it around earth's axis.
3. By spinning it around its, own axis.
4. By spinning it around its moon's axis.
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Question 42 : An astronaut or other body in the spacecraft is said to be weightlessness or?
1. In a state of motion
2. In a state of rest.
3. "In a state of ""zero g"""
4. "In a state of ""zero a"""
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Question 43 : The weight of a body is not a fixed quantity. It depends upon the location as well as upon?
1. The motion of the frame of reference.
2. The shape of the earth.
3. The external force on the body.
4. The rotation of the body.
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Question 44 : The earth's gravitational pull is just balanced by the centripetal force resulting into?
1. Gravitational force.
2. Artificial Gravity.
3. Weightlessness
4. Centripetal acceleration.
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Question 45 : Astronauts experiences weightlessness when their spacecraft is?
1. Orbiting around the earth.
2. Orbiting around its axis
3. Orbiting around the circle
4. Orbiting around the Sun.
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Question 46 : The apparent weight of a person standing in a elevator which is moving down with uniform acceleration will be?
1. Twice the weight of on the surface of the earth.
2. same as the weight on the surface of the earth.
3. Greater than its weight on the surface of the earth
4. less than its weight on the surface of the earth
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Question 47 : The weight of the body is given by?
1. W = ms
2. W = ma
3. W = mv
4. W = mg
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Question 48 : The mass of the body will?
1. Remain same everywhere.
2. Change from place to place.
3. Be equal to its weight.
4. Greater at mountains
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Question 49 : "The force on the object placed near the surface is given by the mass "m" of the object multiplied by the acceleration due to gravity, which is equal to its?"
1. "acceleration ""a""."
2. "weight 'W""."
3. "momentum ""p""."
4. None of these.
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Question 50 : The present accepted value of the universal gravitational constant 0 = 6.673 x 10^-11 Nm²/Kg² was obtained by?
1. Lord Cavendish
2. Poynting
3. P. R. Heyl and P.Chizano Wski
4. Boyle
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