Question

A ball hits the ground and loses 20% of its
momentum. Coefficient of restitution is
1) 0.2 2) 0.4 3) 0.6 4) 0.89
​

Answer 1

Answer:

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Answer 2

Explanation:

Among the various options given in question statement the correct option is the last one.

Coefficient of restitution is the ratio of final speed of an object after rebounding to initial speed before rebounding.

Now it is given that after Collison the momentum is 20 % less, means that final speed is 20% less than original speed. So if initial speed is 1, then final speed would be 0.8