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A sports car is moving at a constant velocity in the +x direction on a flat...

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Physics

A sports car is moving at a constant velocity in the +xdirection on a flat horizontal street.

1) The net force on the car is doing positivework. True or False

2) The driver presses the accelerator, the car accelerates inthe same direction and, thus positive non-conservative work isbeing done.  True or False

3) As the car accelerates, the kinetic energy increases and themomentum decreases.  True or False

4) As the car accelerates, the potential energydecreases.  True or False

5) The driver stops pressing the accelerator and the cars coastswithout friction up a ramp. Going up the ramp the total mechanicalenergy is constant  True or False

6) While moving up the ramp, the potential energy increases bythe same amount as the kinetic energy decreases.  True orFalse

7) When the car started coasting, its speed was 10.0 m/s. Howmuch higher does the car go before starting to roll backwards? (inunits of meters)

8) If all other conditions were the same the car would go higheron the moon.  True or False

9) The kinetic energy of a rolling ball can decrease without achange in its speed.  True or False

10) If the kinetic energy of a rolling ball increases, themagnitude of its momentum must decrease.  True orFalse

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