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A car is travelling at 20m/s on a horizontal road. The brakes suddenly are applied and...

A car is travelling at 20m/s on a horizontal road. The brakes suddenly are applied and the car skids to a stop in 40 s with a constant acceleration.

a) Draw a free body diagram for the car?

b) Write newton's second law in the vector form and project it on the reference system.

c) What is the coefficient of kinetic friction between the tires and road?

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