A body of mass 5 kg initially at rest

Asked by admin @ 13/08/2021 in Physics viewed by 299 People

A body of mass 5kg initially at rest is subjected to a force of 20N. What is the kinetic energy acquired by the body at the end of 10 sec...Please Help

Answered by admin @ 13/08/2021

Hi friend,

Force = mass × acceleration

A= F/m

a= 4 m/s ².

We know that,

K.e = 1/2 mv²

To find v:-

V= u+at

V= 0+40
V= 40 m/s.

K.E = 1/2 ×5×40×40

K.E =4000 J.

Hope this helped you a little!!!

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