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[" To mop-clean a floor,a cleaning machi...

[" 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 "mu," the torque,"],[" applied by the machine on the mop is - "]

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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 the floor is mu , the torque, applied by the machine on the mop is :

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 the floor is mu , the torque, applied by the machine on the mop is : a) muFR//3 b) muFR//6 c) muFR//2 d) (2)/(3)muFR

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In Fig. 7.149 , coefficient of friction between the block and the floor is mu . Force F that will move the block on the floor with a uniform speed is :

Consider an object of mass 2 kg resting on the floor. The coefficient of static friction between the object and the floor is mu_8 = 0.8. What force must be applied on the object to move it?

A horizontal force F pulls a 20 kg box at a constant speed along a horizontal floor. If the coefficient of friction between the box and the floor is 0.25,how much work is done by the force F in moving the box through a distance of 2 m?