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# Motion of a Trolley.

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Introduction

Motion of a Trolley

The weight causes an unbalanced force on the trolley, as it is greater than the friction force. This causes the trolley to accelerate. The smart pulley is connected to the computer, which measures the speed of the string. This is equal to the speed of the trolley.

The acceleration of the trolley is calculated using different weights…

 Weight (N) Start Time(s)

Middle

Acceleration (m/s2)

0.15

0.218

0.128

1.92

0.574

0.446

1.702

0.26

0.20

0.291

0.180

1.54

0.609

0.429

1.249

0.34

0.25

0.333

0.187

1.63

0.745

0.558

1.297

0.43

0.30

0.384

0.193

1.73

0.890

0.697

1.346

0.52

0.35

0.242

0.220

1.14

0.771

0.551

0.898

0.61

0.40

0.240

0.239

1.04

0.800

0.561

0.800

0.70

0.45

0.125

0.227

0.956

0.890

0.663

0.831

0.80

I have found from my results, that the greater the force, the greater the acceleration of the trolley.

Conclusion

My results support my initial theory that as you double the weight; the acceleration of the trolley also doubles. My graph has a straight line of best fit, which goes through the origin; this proves that the weight and the acceleration of the trolley are directly proportional. This evidence all supports my conclusion that the weight and the acceleration of the trolley are directly proportional.

In order to further improve the reliability of my conclusion, I would repeat the investigation, using narrower ranges, i.e. 0.15, 0.16, 0.18, etc. Yet I believe that the conclusion I have already reached is sufficient enough to support my conclusion.

This student written piece of work is one of many that can be found in our GCSE Forces and Motion section.

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