1.

A force of 12N acts on an  object of mass of 4kg in the state of rest for 3s. Calculate the kinetic energy acquired by the  object.​

Answer» ONG>Answer:

we KNOW that, F=m×a

given that,

f=12n

m=4kg

t=3s.

therefore u=0

a=v-u/t=F/m

12/4=3m/s2

v=u+at

v=0+3×3=9m/s

kE=1/2mv2

ke=1/2×4×(9)2

K.E=2×81=162j.

hope it helpful for u



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