Question

A force of 50N acts on a body of mass 8 kg at rest for 4 seconds.calculate the work done by force

Answer 1

Force = 50N

Mass of body = 8kg

Then Weight of body = 80N

(considering g = 10ms-²)

time for which force is applied = 4seconds

Now, it can be clearly seen that the mass of the body itself is higher than the force applied and so, the force applied is not enough to displace the body from it's initial position, causing the Displacement to remain zero.

so, s = 0

Work Done = Fscos∅

=>50×0×cos0°

=>0

So, Work Done = 0J

Cheers!