A multi-disc clutch has 4 steel discs and 3 bronze discs. The outside and inside diameters of contact surfaces are $250 \mathrm{~mm}$ and $180 \mathrm{~mm}$, respectively. The coefficient of friction is 0.3 and axial force is 400 N. Assuming uniform wear, the power in $k W$ that the clutch can transmit at 1000 rpm is

A multi-disc clutch has 4 steel discs and 3 bronze discs. The outside and inside diameters of contact surfaces are $250 \mathrm{~mm}$ and $180 \mathrm{~mm}$, respectively. The coefficient of friction is 0.3 and axial force is 400 N. Assuming uniform wear, the power in $k W$ that the clutch can transmit at 1000 rpm is

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