1.

A sphere of radius 'r' is rolling without sliding. What is the ratio of rotational kinetic energy and total kinetic energy associated with sphere

Answer»

`2/7`
`2/5`
1
`1/2`

Solution :`E_(T) = E_("trans") + E_("rot") =1/2mV^(2)+1/2 IOMEGA^(2)`
`I=2/5 MR^(2), E_(r) =7/10 mV^(2)`
`E_("not")/(E_("trans")) =(1/5 mV^(2))/(7/10 mV^(2)) =2/7`


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