A ball strikes a horizontal floor at an angle of 45degrees with the normal to the floor. The coefficient of restitution between the ball and the floor is 0.5. The fraction of its kinetic energy lost in collision is??

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Answer 1 · 2018-06-25T05:58:36

fraction of its kinetic energy lost
= (final kinetic energy)/(initial kinetic energy)

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so final velocity #v=sqrt((u/sqrt2)^2+((eu)/sqrt2)^2)#.

so, fraction of its kinetic energy lost# =(1/2m(v^2))/(1/2m(u^2))#

put the value and get the answer.