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Motion of Syste...

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  • Question 1
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    The mass of moon is about 0.03 times that of Earth. The distance from the centre of moon to the centre of Earth is about 60 times the radius of Earth. How far is the centre of mass of system from the centre of Earth (R = 6400 km)?

  • Question 2
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    A sphere is rolling on an inclined plane. What is the ratio of its rotational KE to the total KE?

  • Question 3
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    Four identical spheres, each of mass 1 kg and radius 10 cm, are placed on a horizontal surface touching one another such that their centres are located at the corners of a square of side 20 cm. What is the distance of the centre of mass from the centre of sphere?

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