# Two identical small balls, each of mass , are connected by a massless and inextensible string of length  and placed on a smooth horizontal  plane. An external agent starts pulling the string from its mid-point along -axis with velocity  as shown in Fig. When the separation between the two balls reduces to  then the speed of each ball will be a) b) c) d) None of the above

## Question ID - 100409 :- Two identical small balls, each of mass , are connected by a massless and inextensible string of length  and placed on a smooth horizontal  plane. An external agent starts pulling the string from its mid-point along -axis with velocity  as shown in Fig. When the separation between the two balls reduces to  then the speed of each ball will be a) b) c) d) None of the above

3537

(b)

Using conservation of angular momentum about the midpoint, we can find the velocity of each ball relative to the midpoint. i.e.

Resultant velocity of ball= velocity of midpoint + velocity of ball w.r.t. midpoint

or

Next Question :
 In the given figure, the equivalent resistance between the points A  and B  is 1) 2) 3) 4)