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Two identical balls, of equal masses  and , are lying on a smooth surface as shown in fig. Ball  hits ball  (which is at rest) with a velocity  m/s. What should be the minimum value of cofficient of restitution between  and  so that  just reaches the highest point of inclined plane?

a)

b)

c)

d)


Question ID - 100506 :-

Two identical balls, of equal masses  and , are lying on a smooth surface as shown in fig. Ball  hits ball  (which is at rest) with a velocity  m/s. What should be the minimum value of cofficient of restitution between  and  so that  just reaches the highest point of inclined plane?

a)

b)

c)

d)

1 Answer
5876 Votes
3537

Answer Key : (b) -

(b)

 m/s

Let velocity of  after collision be  and that of  be Then

 m/s

 m/s



Next Question :

In the previous problem, the smallest kinetic energy at the bottom of the incline will be achieved by

a)

The solid sphere

b)

The hollow sphere

c)

The disc

d)

All will achieve the same kinetic energy


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