A small steel ball bounces on a steel pl...

A small steel ball bounces on a steel plate held horizontally. On each bounce the speed of the ball arriving at the plate is reduced by a factor e (coefficient of restitution) in the rebound, so that
`V_("upward")=eV_("downward")`
If the ball is initially dropped from a height of 0.4 m above the plate and if 10 seconds later the bouncing ceases. The value of e is

`sqrt((2)/(7))`

`(3)/(4)`

`(13)/(18)`

`(17)/(18)`

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