Question

The graph of potential energy V (r) vs distance r’ between the centers of two billiard balls have been plotted as (a); (b); (c) and (d) above. Which of the following statements is true about elastic collision between the balls. The variation of V(r) vs r is best represented by

(1) (b) and (c) only

(2) (a) only

(3) (b) only

(4) (a) and (d) only

Answer 1

(3) (b) only

The potential energy V(r) of the balls should be

These condition are satisfied only in graph (b)