Question

calculate the work done by the force if it is acting On 20 kg mass changes its velocity

from 5 m/sto 2 m/s 1.5​

Answer 1

Answer:

Given : Initial velocity u=5 m/s

Final velocity v=2 m/s

The work done is equal to the change in the kinetic energy of an object.

W=

2

1 m(v 2 −u 2 )

W= 21×20×(2 2 −5 2 )

⟹W=−210 J