constant applied force ?p of 15.0 N pushes a box with a mass ?=6.00 kg a distance ?=15.0 m across a level floor. The coefficient of kinetic friction between the box and the floor is 0.150.Assuming that the box starts from rest, what is the final velocity ?f of the box at the 15.0 m point If there were no friction between the box and the floor, what applied force ?new would give the box the same final velocity?

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Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.