Primary 2 are working on a project called ‘Roll up roll up’ this term.
As part of this project in science they have been answering the question:
Why don’t roller coasters have engines?
Answer: That’s because they don’t need them!
Gravity is the force that pulls things to the ground. Roller coasters rely on gravity to take them to the end of the track. So today we tested how kinetic energy helps to keep the roller coaster moving. We used a range of different objects to see if the weight affected the speed and how far the moving object would travel along a track.