1.

is applied on a body of mass 20 kg moving with a velocity of 40bady attains a velocity of 50 ms"t in 2 seconds. Calculate the work done by the bodyTh

Answer»

Work = F x s = m x a x s

a = (v -u)/t = 5 ms-2

s = (v2-u2)/2a = (2500 - 1600)/10 = 90 m

Work = m x a x s = 20 x 5 x 90 = 9000 kgm2s-



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