The diagram illustrates part of a rollercoaster track with the car shown at several positions. The car moves without power from position X down to position Y and then climbs the slope on the far side. What occurs to the energy in the kinetic store and the gravitational potential store of the car as it travels from position X to position Y?
- Aenergy in kinetic store decreases; energy in gravitational potential store decreases
- Benergy in kinetic store decreases; energy in gravitational potential store increases
- Cenergy in kinetic store increases; energy in gravitational potential store decreases
- Denergy in kinetic store increases; energy in gravitational potential store increases