Question

A steel ball of mass 2m suffers one-dimensional elastic collision with a row of three steel balls, each of mass m. If mass
2m has collided with velocity v and the three balls numbered 1, 2, 3 were initially at rest, then after the collision​

Answer 1

Answer:

Since the collision is elastic we can apply law of conservation of momentum and check each option.

For eq, as per option A, applying law of conservation of momentum

2mv=m

3

v

+m

3

v

+m

3

v

2v=v which is not possible , so option A is incorrect

Similarly option B is incorrect

Looking at option C,

2mv=mv+mv which is possible, hence option C is correct

As per option C only ball 1 and ball of mass 2m would remain at rest after collision.

Hence, option D is also correct.

Answer 2

Step-by-step explanation:

goA steel ball of mass 2m suffers one-dimensional elastic collision with a row of three steel balls, each of mass m. If mass

2m has collided with velocity v and the three balls