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A ball strikes a horizontal floor at `45^(@)`. 25% of its kinetic energy is lost in collision. Find the cofficient of resultationA. `(1)/(2)`B. `(1)/sqrt(2)~C. `(1)/(2sqrt(2))`D. `(1)/(4)` |
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Answer» `((1)/(2)mU^(2)-(1)/(2)mV^(2))/((1)/(2)mU^(2))=(1)/(4)rArrV=Usqrt((3)/(4))` `V=sqrt((3)/(4))U=[((U)/sqrt(2))^(2)+((eU)/sqrt(2))^(2)]^(1//2)` `e=(1)/sqrt(2)` |
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