If a man increse his speed by 2m/s, his J.E. is doubled, the original dpeed of man is :
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Let KE is 1/2mv^2.
He increases speed by 2m/s,so new speed will be (v+2)m/s.
So form the equation now,2×1/2mv^2=1/2m(v+2)^2.
Solve it and then cheers.
He increases speed by 2m/s,so new speed will be (v+2)m/s.
So form the equation now,2×1/2mv^2=1/2m(v+2)^2.
Solve it and then cheers.
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