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A particle is moving on rough horizontal ground with an initial velocity v0. If 34th of its kinetic energy is lost due to friction in time t0, then the coefficient of friction between the particle and the ground is

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Important Questions on Friction

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A ladder rests against a frictionless vertical wall, with its upper end 6m above the ground and lower end 4m away from the wall. The weight of ladder is 500N and centre of
gravity =13rddistance from the lower end. Wall's reaction will be, in N
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Two blocks of masses M1=4 kg and M2=6 kg are connected by a string of negligible mass passing over a frictionless pulley as shown in the figure below. The coefficient of friction between block M1 and the horizontal surface is 0.4. When the system is released, the masses M1 and M2 start accelerating. What additional mass m should be placed over M1, so that the masses M1+m slide with a uniform speed?

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Assertion: Angle of repose is equal to angle of friction.
Reason: When the body is just at the point of motion, the force of friction in this stage is called as limiting friction.
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Assertion: A car moving on a horizontal road may be thrown out of the road in taking a turn due to lack of proper centripetal force.

Reason: If a particle moves in a circle, describing equal angles in equal intervals of time. Then the velocity vector changes its magnitude.