Q. 44.3( 37 Votes )
How fast should a man of 50 kg run so that his kinetic energy will be 625 J?
Answer :
Given that ,
m(mass)= 50 kg and K.E.(kinetic energy) = 625 j
K.E.=1/2×(m×v2)
1/2×(50×v2) = 625
v2 =(625 × 2)/50=1250/50=25
v = √25= 5 m/s Ans
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