A force of 10N acts on a body of 2Kg for 3s. Find the kinetic energy acquired by the body in 3seconds.
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a = F/m. I need the velocity at time t = 3 seconds, u = 0 , F = 10N , m = 2kg. v = 15 m/s . Now, Kinetic energy = 1/2mv² = 1/2(2)(15)² = 15² = 225 J
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F =10N
a=F/m=10/2=5m/s2
v=u+at
0+5*3=15
k.e.= 1/2 mv2
=1/2*2*225
=225j
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