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Q. 30

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 288

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Short Answer

A ball of mass m and another ball of mass 3m are placed inside a smooth metal tube with a massless spring compressed between them. When the spring is released, the heavier ball flies out of one end of the tube with speed . With what speed does the lighter ball emerge from the other end?

The speed will be

See the step by step solution

Step by Step Solution

Step 1: Given information 

We have given,

Ball of masses =

Speed of ball =

We have to find the speed of ball of mass m.

Step 2: Simplify

Both the balls are initially in the rest then the momentum will be zero initial and also the final due to conservation of momentum of particles.

Then,

Where negative sign for the opposite direction.

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