Question

A body of mass 5kg initally at rest is subjected to a force of 2oN what is the kinetic energy aqurred by the at the end of 10 sec

Answer 1

m=5 kg

f=20 n

t=10s

f=ma

20=5*a

a=4 m/s^2

a=v/t

4=v/10

v=40 m/s

kinetic energy=1/2 mv^2

                       =1/2*5*40*40

                       =4000 J

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