Question

In: Physics

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

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

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

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

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

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

5) The driver stops pressing the accelerator and the cars coasts without friction up a ramp. Going up the ramp the total mechanical energy is constant  True or False

6) While moving up the ramp, the potential energy increases by the same amount as the kinetic energy decreases.  True or False

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

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

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

10) If the kinetic energy of a rolling ball increases, the magnitude of its momentum must decrease.  True or False

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