Question

A particle of mass 100 g is thrown vertically
upwards with a speed of 5 ms. The work done by
the force of gravity during the time the particle
goes up is
(a) – 125J (b) 1.25 J (c) 0.5J (d) -0.5 J
​plzz reply faster

Answer 1

Hello Dear

We can use work energy theorem here

since force and displacement are in different directions so the answer will be negative.

W=change in kinetic energy

= 0-0.1×25/2=-1.25 J

hope it helps