Question: A disk clutch is required to transmit (5 mathrm{~kW}) at (2000 mathrm{rpm}). The disk has a friction lining with coeffient of friction equal to 0.25

A disk clutch is required to transmit $5 \mathrm{~kW}$ at $2000 \mathrm{rpm}$. The disk has a friction lining with coeffient of friction equal to 0.25 . Bore radius of friction lining is equal to $25 \mathrm{~mm}$. Assume uniform contact pressure of $1 \mathrm{MPa}$. The value of outside of the friction lining is

(a) $39.4 \mathrm{~mm}$

(b) $49.5 \mathrm{~mm}$

(c) $97.9 \mathrm{~mm}$

(d) $142.9 \mathrm{~mm}$.

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