Questions on Energy Transitions
Q5. The photograph shows some pupils in a log car on a theme-park ride.
![](photo5.png)
The drawing below shows the ride. The letters A, B, C, D, E and F show different points along the track.
![](diagram5.png)
The car starts from A and travels to F, where it stops by hitting a bumper. At E the car enters a trench filled with water.
(a)
(i) At which two points does the car have no kinetic energy? Give the two correct letters.
A and F
1 mark
(ii) At which point does the car have the most gravitational potential energy? Give the correct letter.
A
1 mark
(iii) At which point does the car have some kinetic energy and the least gravitational potential energy? Give the correct letter.
E
1 mark
(b)
(i) The cars are not powered by a motor. What force causes the cars to move along the track from B to C?
The force of gravity or the weight of the car
1 mark
(ii) When a car splashes through the water at E, it slows down. What force acts on the car to slow it down?
Friction OR drag OR water/air resistance
1 mark
(c) Complete the sentence below by choosing from the following words.
![](diagram5a.png)
When the car hits the bumper at F, its ........kinetic........ energy is transferred into .........sound.......... energy and ...........thermal...... energy.
3 marks
Maximum 8 marks