(Solved): (c) A fan is driven on a belt of \( 12 \mathrm{~mm} \) thickness and \( 350 \ ...

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(c) A fan is driven on a belt of \( 12 \mathrm{~mm} \) thickness and \( 350 \mathrm{~mm} \) width on a motor which runs at \( 1200 \mathrm{rpm} \). The belt is to run on two pulleys with \( 550 \mathrm{~mm} \) diameter and 1550 \( \mathrm{mm} \) diameter respectively as shown in Figure Q1(a). The density of the belt is 970 \( \mathrm{kg} / \mathrm{m}^{3} \) with a coefficient of friction of \( 0.4 \). The allowable stress of the belt is \( 4.5 \) MPa. Calculate the power capacity of the motor.