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An object of mass 3 kg is dropped from the roof of a two-storey house and reaches the ground with a speed of 10 mfs.

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An object of mass 3 kg is dropped from the roof of a two-storey house and reaches the ground with a speed of 10 mfs. Neglecting friction, calculate: i. the kinetic energy of the object when it reaches the ground. ii. the potential energy of the object when it is on the roof. iii. the height of the roof. iv. the total mechanical energy of the object when it is 1 m above the ground

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