A man spends 6.4 kJ energy in dislplacing a body by 64m in the direction which he applies force, in 2.5 s. Calculate: (i) The force applied. (ii)The power spent (in HP) by the man.
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Answer:
work done = energy spent = 6.4 KJ = 6400J
6400 = Force × Distance
Force = 6400/64 = 100 N
Power = Work done/Time = 6400/2.5 = 2560 watt = 2560/746= 3.43 HP=
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