### What is the length of driveway

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Q. A 2.10 x 10^3 kg car starts from rest at the top of a driveway that's sloped at an angle of 20.0 degrees with the horizontal. An average friction force of 4.00 x 10^3 impedes the cars motion so that the cars speed at the bottom of the driveway is 3.80m/s. What is the length of driveway?

Q. A flywheel having constant angular acceleration requires 4.6-{rm s} to rotate through 162 rad. Its angular velocity at the end of this time is 100 rad/s. Find out the angular velocity at the beginning of the 4.6s interval; the angular acceleration of the flywheel.

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