Question

an object of mass 10kg is moving with velocity of 10 meter per second. A force of 50N acted upon it for 2s . potential energy increases in it is ______​

Answer 1

Answer:

Given,

m=10kg

u=10m/s

v=−2m/s

t=4sec

The acceleration is rate of change of velocity,

a=tv−u

a=4−2−10

a=4−12=−3m/s2

The correct option is B.