Gravitation Worksheet-8
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State the kepler’s law which is represented by the relation r3 ∝ T2.
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Which of the Kepler's laws of planetary motion led Newton to establish the inverse-square rule for gravitational force between two bodies ?
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Name the property of earth which is responsible for extremely small acceleration being produced in it as a result of attraction by other small objects.
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What is the acceleration produced in a freely falling body of mass 10 kg ? (Neglect air resistance)
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When an object is dropped from a height, it accelerates and falls down. Name the force which accelerates the object.
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Give the formula for the gravitational force F between two bodies of masses M and m kept at a distance d from each other.
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What force is responsible for the earth revolving round the sun ?
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What name has been given to the force with which two objects lying apart attract each other ?
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What type of force is involved in the formation of tides in the sea?
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Which force is responsible for holding the solar system together ?
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What is the weight of a 1 kilogram mass on the earth ? (g = 9.8 m/s2).
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On what factor/factors does the weight of a body depend ?
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As the altitude of a body increases, do the weight and mass both vary ?
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If the same body is taken to places having different gravitational field strength, then what will vary: its weight or mass ?
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If the mass of an object be 5 kg, what is its weight ? (g = 9.8 m/s2).
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The weight of a body is 50 N. What is its mass ? (g = 9.8 m/s2).
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A body has a weight of 10 kg on the surface of earth. What will be its weight when taken to the centre of the earth ?
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Write down the weight of a 50 kg mass on the earth. (g = 9.8 m/s2).
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If the weight of a body on the earth is 6 N, what will it be on the moon ?
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Explain what is meant by the equation:
where the symbols have their usual meanings.
Answer:
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The cube of the mean distance of a planet from the sun is directly proportional to the square of time it takes to move around the sun
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Kepler’s third law
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Extremely large mass of earth
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9.8 m/s2
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Gravitational force (of earth)
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Gravitational force
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Gravitational force
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Gravitational force exerted mainly by the moon.
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Gravitational force (of the sun)
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9.8 N
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Mass of the body as W = mg
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Weight varies; Mass does not vary
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Weight
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49 N
W = mg
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W = mg 5.102 kg
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–
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Using w = mg
490 N
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About 1 N
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