Question

A body of mass 5 kg initially at rest is subjected to a horizontal force of 20 N. what is the kinetic energy acquired by the body at the end of 10 s?

Answer 1

Answer:

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!!!

Explanation:

Answer 2

Answer:

5kg,in 20N=20÷5=4×10s=40s