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Earn 100
Assertion: When an object is weighed with a physical balance, then its mass will be the same both at the pole and at the equator.
Reason: When a body is weighed with a spring balance, then its weight will be maximum at the pole.
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Important Questions on Gravitation
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A satellite is placed in a circular orbit about Earth with a radius equal to half the radius of the moon's orbit. The period of rotation of the satellite is times that of the lunar month (lunar month is the period of revolution of the moon). The value of is
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A diametrical tunnel is dug across the Earth. A ball is dropped into the tunnel from one side. The velocity of the ball, when it reaches the centre of the Earth is (Given: gravitational potential at the centre of Earth )
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The acceleration due to gravity at a height of the radius of the earth above the earth surface is . Its value at a point at an equal distance below the surface of the earth in is about? (Take the value of at the earth's surface as )
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Which of the following statements about the gravitational constant is true?
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Two astronauts are floating in gravitational free space after having lost contact with their spaceship. The two will
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The universal gravitational constant has a dimension
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The gravitational acceleration on the surface of the earth of radius and mean density is
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Two identical solid copper spheres of radius placed in contact with each other. The gravitational attraction between them is proportional to
