270278 A grinding machine whose wheel has a radius of\(\frac{1}{\pi}\) is rotating at \(2.5 \mathrm{rev} / \mathrm{sec}\). A tool to be sharpened is held against the wheel with a force of \(40 \mathrm{~N}\). If the coefficient of friction between the tool and the wheel is 0.2 , power required is

270279 A block\(A\) of mass \(3 \mathrm{~kg}\) and another block \(B\) of mass \(2 \mathrm{~kg}\) are connected by a light inextensible string as shown in figure. If the coefficient of friction between the surface of the table and \(A\) is 0.5 . What maximum mass \(C\) is to be placed on A so that the system is to be in equlibrium?

270278 A grinding machine whose wheel has a radius of\(\frac{1}{\pi}\) is rotating at \(2.5 \mathrm{rev} / \mathrm{sec}\). A tool to be sharpened is held against the wheel with a force of \(40 \mathrm{~N}\). If the coefficient of friction between the tool and the wheel is 0.2 , power required is

270279 A block\(A\) of mass \(3 \mathrm{~kg}\) and another block \(B\) of mass \(2 \mathrm{~kg}\) are connected by a light inextensible string as shown in figure. If the coefficient of friction between the surface of the table and \(A\) is 0.5 . What maximum mass \(C\) is to be placed on A so that the system is to be in equlibrium?