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How does the Kinetic Energy of a trolley (toy car) depend on the height from which it is released

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Introduction

Mukhtar Azam 10.O

Physics Coursework: PLAN

How does the Kinetic Energy of a trolley (toy car) depend on the height from which it is released

Apparatus

For this experiment I will require the following apparatus;

The apparatus will be set up as shown in the diagram above. I will begin timing each experiment when the toy car is released from the height I choose (90cm). Timing will stop once the car has reached to the bottom of the ramp.  

Different Heights from which the car is released

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Middle

Using these heights will mean that a good range of results will be obtained, therefore making this experiment more reliable and easier to draw conclusions from.

Preliminary Work

During my preliminary work I tested the lowest and highest heights from which I , I did this to find the shortest and longest times it would take to do the experiment. The results obtained are shown below:

Distance from which released (cm)

Height from which released (cm)

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Conclusion

I predict that as the height used doubles the kinetic energy of the car will also double. This is because as you double the height you double the Potential Energy therefore you double the kinetic energy, as the Potential Energy at the start is the same as the kinetic energy at the end. On the other hand if I decrease the height there will be less potential energy with the car, this means the car will be slower so there will be less kinetic energy. I think that the height from which the car is released and the kinetic energy will be directly proportional to each other, because height increases the kinetic energy will also increase. I should find that the highest height used (50cm) is five times faster than the lowest height used (10cm).

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