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To investigate how the height of a ramp affects the speed of a trolley

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Introduction

Physics Coursework

To investigate how the height of a ramp affects the speed of a trolley

The aim of the experiment was to investigate how the height of the ramp affected the time it took for the toy car to reach the bottom.

Equipment used

Ramp- I used the ramp for the trolley to go down

1-meter ruler- this was used to measure out the height of ramp and for when I was changing the height of the ramp for the investigation

Trolley- the trolley was used instead of a toy car because it weighed more than the toy car, and there is enough momentum.

Stop watch- This was used to measure the time in which it took the trolley and to run down the desired heights of the ramps

Clamp stand- a clamp stand was used to hold up the ramp

G clamp- this was used to hold down the ramp stand, because I needed the clamp to be steady.

Hypothesis 

The greater the height of the ramp the more the speed of the trolley
would increase.

Prediction 
I predicted that the more the ramp increases in height the more the 

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Middle

Pattern of graph

The pattern on the graph shows steady acceleration on the trolley at 
each chosen height. The graph also shows that the relationship between 
the ramps increasing in height the change in speed does increase as 
well. The graph also shows that the relationship between the height of 
the ramp and the change in speed is NOT directly proportional, but 
instead just proportional. 

Height of ramp 9(cm)

Length of ramp 9(cm)

Mass of trolley

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Conclusion

Evaluation of my conclusion

I think that my experiment went well over all and was reliable as I repeated it 2 times to get an average, also I made sure everything was accurate and my graph showed this because as I accepted there was a positive trend which lead to a solid conclusion. There is an increasing GPE as the height increases and therefore led to an increase in kinetic energy and speed. The trolley is at is at its highest point of 60cm it has the highest GPE then as the trolley drops to a lower level it loses GPE. However it gains the same amount of kinetic energy. If the kinetic energy increases it means the speed is increasing because the mass of the trolley went hence taking less time to reach to the bottom of the ramp.

...read more.

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