An open belt drive transmits a power of \(5 \mathrm{~kW}\). The linear velocity of the belt is \(8 \mathrm{~m} / \mathrm{sec}\). The angle of the lap on the smaller pulley is \(165^{\circ}\). The coefficient of friction between belt and pulley is 0.25 . Determine the effect of the following on power transmission.

(a) Initial tension in the belt is increased by \(5 \%\).

(b) The angle of the lap is increased by \(5 \%\) using, idler pulley for same speed and tension in the tight side.

(c) The coefficient of friction is increased by \(5 \%\).