To mop-clean a floor, a cleaning machine presses a circular - Study24x7

To mop-clean a floor, a cleaning machine presses a circular mop of radius R vertically down with a total force F and rotates it with a constant angular speed about its axis. If the force F is distributed uniformly over the mop and if coefficient of friction between the mop and the floor is μ, the ...

A

(2/3) μFR

B

μFR/3

C

μFR/2

D

μFR/6

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