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SYSTEMS PREPARATION 2007 - QUESTIONS - 1

V. Ryan 2007

 

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

 

 
2. What is Kinetic Energy ?
 
   
ANSWER
   
The energy a body possesses because it is moving.
   

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?

Potential energy is:  
 
   
ANSWER
   

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 ?

PART A:_______________________________________
   
PART B:_______________________________________
   
ANSWERS
   
PART A: Pinion
   
PART B: Rack
 
 

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

 
 
 
 
ANSWER
 

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.

 
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