Question 01) State the universal law of gravitation in detail.
Question 02) Write the formula to find the magnitude of the gravitational force between the earth and an object on the surface of the earth.
Question 03) What do you mean by free fall?
Question 04) What are the differences between the mass of an object and its weight?
Question 05) How does the force of gravitation between two objects change when the distance between them is reduced to half?
Question 06) What happens to the force between two objects, if
(i) the mass of one object is doubled?
(ii) the distance between the objects is doubled and tripled?
(iii) the masses of both objects are doubled?
Question 07) Amit buys few grams of gold at the poles as per the instruction of one of his friends. He hands over the same when he meets him at the equator. Will the friend agree with the weight of gold bought? If not, why?
[Hint: The value of gis greater at the poles than at the equator].
Question 08) Explain universal gravitational constant with help of following diagram-
Question 09) . Why does a block of plastic released under water come up to the surface of water?
Question 10) Apply universal equation of gravitation and find the value of G.
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Mass of Object 1 (kg)
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Mass of object 2 (kg)
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Separation Distance (m)
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Force of Gravity (G)
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Football Player
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Earth
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6.38 x 106 m
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a.
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100 kg
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5.98 x1024 kg
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(on surface)
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b.
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Ballerina
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Earth
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6.38 x 106 m
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40 kg
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5.98 x1024 kg
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(on surface)
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c.
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Physics Student
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Earth
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6.60 x 106 m
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70 kg
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5.98 x1024 kg
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(low-height orbit)
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d.
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Physics Student
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Physics Student
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1 m
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70 kg
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70 kg
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e.
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Physics Student
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Physics Student
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0.2 m
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70 kg
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70 kg
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f.
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Physics Student
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Physics Book
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1 m
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70 kg
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1 kg
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g.
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Physics Student
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Moon
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1.71 x 106 m
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70 kg
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7.34 x 1022 kg
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(on surface)
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h.
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Physics Student
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Jupiter
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6.98 x 107 m
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70 kg
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1.901 x 1027 kg
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(on surface)
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