4. A 2.10 x 10' kg car starts from rest at the top of a 5.0 m...
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4. A 2.10 x 10' kg car starts from rest at the top of a 5.0 m long driveway that is sloped at 20 with the horizontal. If an average friction force of 4.0 x 10' N impedes the motion, find the speed of the car at the bottom of the driveway