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There is a 7.8 × 10^3 kg car accelerates from rest at the top of a...

There is a 7.8 × 10^3 kg car accelerates from rest at the top of a driveway that is sloped at an angle of 19.8◦ with horizontal. average frictional force of 4.3×103 N impedes its motion so car’s speed at bottom of driveway is 4.2 m/s.    a= 9.81 m/s2 .

What is the length of the driveway? Answer in units of m.

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