A ball is dropped to a surface for which coefficient of collision is .8. It means it returns to a he

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26 Jan 2012 ball

A ball is dropped to a surface for which coefficient of collision is .8. It means it returns to a height equal to .8^2 h after the collision, here h is he initial height of the ball. Height after 3 collisions will be. You should consider ball as a point particle.

OPtion

1) h
2) 0
3) 0.64h
4) 0.26h
5) 0.41h
6) 0.50h
7) 0.21h
8) 0.13h
9) ball will stop after 2 collision
10) none of these

Solution

after 1 collision height = 0.8^2 h = 0.64 h
after 2 collisions height = 0.8^2 0.64h = 0.4096 h
after 3 collisions height = 0.8^2 0.4096h = 0.262144h = 0.26h

Correct Option: 4 Best Solution (3)