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A toboggan carrying two children (totalmass = 85kg) reaches its maximum speed at the bottom of hill, and then glides to a stop in 21

A toboggan carrying two children (totalmass = 85kg) reaches its maximum speed at the bottom of hill, and then glides to a stop in 21 m along a horizontal surface. The force of friction between the toboggan and the snowy surface is 91.6N.

A. Draw a FBD of the toboggan as it slows down

b. Calculate the work done on the toboggan by the friction on the snowy surface . Should the work be positive or negative ? Explain .

c. Calculate the acceleration of the toboggan .

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