A tobogganer coasts down a hill and then goes over a slight rise with speed 2.7 m/s. The top of this rise can be taken to be a circle of radius 4.1m. The toboggan and occupant have a combined mass of 110 kg. If the coefficient of kinetic friction between the snow and the toboggan is 0.10, what frictional force is exerted on the toboggan by the snow as the toboggan goes over the top of the rise? Start with a free-body diagram of the toboggan with the person inside, at the top of the rise. (Use gg = 9.8 m/s2) Express your answer using two significant figures.

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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.