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A ball is dropped from a height of 9m on...

A ball is dropped from a height of 9m on a fixed plane floor. What distance will it describe before it comes to rest ?(The coefficient of restitution is e= 1/2)

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Distance travelled
S=(1+l^2)/(1-l^2)h0=(1+1/4//(1-1/4)xx0.9=5/3xx0.9=1.50m`
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