6.4 kJ of energy causes a displacement of 64m in a body in the direction of force in 2.5s. calculate the force applied and the power in HP ( take i HP as 746 w)

Asked by mahimachaki chaki | 23rd Feb, 2014, 09:08: AM

Expert Answer:

According to work enegy theorm,
 
W = K.E = 6.4 kJ = 6.4 x 103 J

W = F.d. cos θ

Now the displacement of the body is in the direction of applied force.

θ = 0

W = F.d

F = W/d = (6.4 x 103 J)/64 m

F = 100 N

Power P = W/t

              = (6.4 x 103 J)/(2.5)

              =16 x 103 W

              =1.6 x 104 W

              = (1.6 x 104) / 746

              = 0.0021 x 104 H.P.

Power P = 21 H.P.

Answered by  | 24th Feb, 2014, 03:15: PM

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