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MCQs and Quizzes on Gravitational Law Planetary Motion and Artifical Satellites in Mechanics Physics
The working of a rocket is based on the principle of
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Option 1
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Newton’s law |
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Option 2
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Electricity |
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Option 3
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Conservation of momentum |
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Option 4
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Kepler’s law |
The square of a satellite time of revolution round the earth is____________.
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Option 1
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Directly proportional to radius of orbit |
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Option 2
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Directly proportional to the cube of radius of orbit |
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Option 3
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Inversely proportional to radius of orbit |
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Option 4
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Inversely proportional to the cube of radius of orbit |
The gravitational force between two bodies does not depend upon
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Option 1
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Their separation |
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Option 2
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The product of their masses |
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Option 3
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The constant of gravitation |
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Option 4
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The sum of their masses |
If the earth stopped rotating, the weight of objects at the equator would
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Option 1
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remain same |
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Option 2
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decreases |
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Option 3
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Vary with latitude |
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Option 4
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Be greater |
The escape velocity ________________
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Option 1
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Decreases with the increase of the mass of the body |
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Option 2
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Increases with the increases of the mass of the body |
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Option 3
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Depends on the type of body used |
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Option 4
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Is independent of mass of the body |
The escape velocity from the earth’s surface is _________
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Option 1
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1.5 km/sec |
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Option 2
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11.2 km/sec |
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Option 3
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2.1 km/sec |
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Option 4
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12.1 km/sec |
A satellite travels in a circular orbit at a speed of 20,000 km/hr to stay at a constant attitude. To escape from the earth, the speed would have to be increased to
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Option 1
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29,000 km/hr |
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Option 2
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40,000 km/hr |
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Option 3
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23,000 km/hr |
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Option 4
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66,000 km/hr |
