In above problem, if coefficient of friction for both the spheres is same and let t^(1)and t^(2)be the times when pure rolling of solid sphere and of hollow sphere is started. Then :

In above problem, if coefficient of friction for both the spheres is s

1.	In above problem, if coefficient of friction for both the spheres is same and let t^(1)and t^(2)be the times when pure rolling of solid sphere and of hollow sphere is started. Then :
Answer» `t_(1) = t_(2)` `t_(1) lt t_(2)` `t_(1) gt t_(2)` None of these Solution :Friction force `mu` mg acts in forward DIRECTION till pure ROLLING is started. Hence, linear acceleration `a=(mumg)/(m) = mugtherefore v=at` or `t=v/a = omega_(0)/(mug(1/R + (mR)/I)` Again `I_("SOLID") lt I_("hollow") therefore t_("solid") lt t_("hollow")` or `t_(1) lt t_(2)`

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In above problem, if coefficient of friction for both the spheres is same and let t^(1)and t^(2)be the times when pure rolling of solid sphere and of hollow sphere is started. Then :

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