1.

The total normal force (F) acting on the area of contact of disc clutch (Assuming uniform distribution of interface pressure) is:(Where P is the intensity of pressure, r0 and ri outer and inner diameter of disc respectively)

A. \(F = \pi P\left( {r_0^2 - r_i^2} \right)\)
B. \(F = \pi P{\left( {r_0^4 - r_i^4} \right)^{1/2}}\)
C. \(F = 2\pi P{r_i}\left( {{r_0} - {r_i}} \right)\)
D. \(F = 2\pi P{r_0}\left( {{r_0} - {r_i}} \right)\)
Answer» B. \(F = \pi P{\left( {r_0^4 - r_i^4} \right)^{1/2}}\)


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