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Question

A comet travels around the sun in elliptical orbit and its mass is 108 kg. When comet is 2.5×1011m away, its speed is 2×104ms1. Find the change in KE, when it has reached 5×1011m away from the sun.

A
38×108J
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B
48×108J
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C
58×108J
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D
56×108J
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