Posted by **Leewillikers** on Wednesday, February 6, 2013 at 2:30am.

An 9000 test car travels 40.5 before stopping from an initial speed of 25.7 on dry horizontal pavement with its wheels locked.

a)Make a free-body diagram of this car while it is slowing down.

b) What external force causes it to slow down?

c)Assuming constant acceleration, find the magnitude of the force in part A.

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