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[ash190]

Imagine you're in a vacuum, and you have a perfectly elastic ball
you drop it from a height 'h.', after hitting the ground, it bounces back up to a fraction of its original height, say 'b.'

calculate the COR for this ball

[OngBonga]

Not enough information.

[MadMojoMonkey]

Imagine you're in a vacuum, and you have a perfectly elastic ball
you drop it from a height 'h.', after hitting the ground, it bounces back up to a fraction of its original height, say 'b.'

calculate the COR for this ball

For everyone else, CoR is Coefficient of Restitution.


without googling, it's b/h, right?


post googling, ah... no it's not energy ratio, it's speed ratio before and after bounce
Energy is kinetic there, so the ratio would be of the square root of the max height
so
COR = SQRT(b/h)