# Collision

Please help with the following solution.

A softball of mass 0.221 kg that is moving with a speed of 6.5 m/s (in the positive direction) collides head-on and elastically with another ball initially at rest. Afterward it is found that the incoming ball has bounced backward with a speed of 4.3 m/s.

(a) Calculate the velocity of the target ball after the collision.

(b) Calculate the mass of the target ball.

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#### Solution Preview

Please refer to the attachment.

SOLUTION

Principles used :

1. Law of conservation of linear momentum : When two bodies collide, their momentum is conserved. That is, total momentum of the bodies before and after collision is same. This is applicable irrespective of whether the collision is elastic or inelastic.

2. Conservation of kinetic energy : In an elastic collision, the total kinetic energy of the colliding ...

#### Solution Summary

Step by step solution provided for calculating the velocity of a target ball after collision and the mass of a target ball. Step by step calculations are provided in the posting.