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Question

A body of mass 2 kg has an initial velocity vi=(^i+^j)ms1. After collision with another body its velocity becomes vf=(5^i+6^j^k)ms1. If the impact time is 0.02 s, the average force of impact on the body (in newton) is

A
50(4^i+5^j+^k)
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B
50(4^i5^j^k)
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C
100(4^i+5^j^k)
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D
100(4^i+5^j^k)
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