1. Diesel trains are used throughout the country. They use diesel as a fuel for engines which drive the train forwards at high speed, creating movement. Complete the systems diagram below to show the main energy changes.

ANSWER

3. The train seen below is at the top of an incline. At any point it could roll downwards, gathering speed. What is potential energy?

The energy which a body has because of its position, eg. a coiled spring or a train at the top of a hill.

4. The train at the bottom of the steep incline has a special gear system. On the diagram the gear system is marked A and B. What are the correct names for parts A and B ?

5. Explain why the gear system shown above is used where there are speed inclines.

Trains cannot travel up steep inclines as their wheels have no grip. The rack and pinion allows the train to grip the track. The pinion is a special gear. Its teeth ‘mesh’ with the teeth on the rack, pulling the train up the incline.