Questions
A running man has half the kinetic energy that a body half his mass has. The man speeds up by f m/s and then has the same kinetic energy as the boy. The original speed of the man is
detailed solution
Correct option is A
Given that E1=E2/2 or 12mv12=1212×m2×v22 or v2=2v1 Finally ,12mv1+12=12×m2×v22 =12×m2×2v12 V1=(2+1)m/sTalk to our academic expert!
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The curved portions are smooth and horizontal surface is rough. The block is released from P. At what distance from A, it will stop (if = 0.8)?
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