Question

Q.7
The displacement-time graph of a body
acted upon by some forces is shown in
figure.
B
с
2.1
s
A
t-
Select the correct alternative(s) :
(A) Work done by the forces during BC is
zero
(B) Work done by the forces during AB is
zero
(C) Work done by the forces during AB is
positive
(D) Work done by the forces during OA is
positive (OA is a part of a parabola)​

Answer 1

Explanation:

ANSWER

The work done by centripetal force is zero because displacement is always perpendicular to the centripetal force in the circular motion. W=F.ds =0 (for centripetal force.)

This implies that the displacement of the the particle in the direction of the centripetal force is zero.