Question

The car on the roller coaster is released from the position shown and allowed to roll freely.
Name two of the forces that affect the motion of the car while it moves on the roller coaster.
Describe how the potential and kinetic energy of the car change as the car rolls downhill.
Explain why the car cannot reach point X on the third hill, as shown in the picture.

Answer 1

Answer:

Gravitational potential energy,Kinetic energy.     when goes down potential goes into kinetic.    Cant reach x because not enough potential energy

Explanation:

Answer 2

Answer:

The energy changes from gravitational potential energy to kinetic energy to potential energy (static) again.

It does not have sufficient potential energy to overcome the 30 m elevation.  

Explanation:

The car at its highest point possesses gravitational potential energy which is given by the following:

$E_{p} = mgh$

This energy upon rolling is converted to kinetic energy given by:\

$E_{k} = \frac{1}{2}mv^{2}$

The kinetic energy is then changed to static potential energy after the 10 m hump.

The car cannot react point X because from the 10 m hump it does not have sufficient potential energy to overcome the 30 m elevation.