A particle of mass 100 g is thrown vertically upwards with a speed of 5 m/*. The work done by the force of gravity during the time the particle goes up is :
(A) – 0.5 J
(B) – 1.25 J
(C) 1.25 J
(D) 0.5 J
Correct option (B) – 1.25 J
Explanation:
The height (h) tranversed by particle while going up is :
Work done by gravity force = mg.h
(Angle between force and displacement is 180°)
