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Isaac Newton's second Law of Motion states that, Force = Mass x Acceleration.

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Introduction

Newton’s Second Law Coursework

Introduction

Isaac Newton’s second Law of Motion states that, Force = Mass x Acceleration. For this project I intend to prove or disprove this theory.  The fact that the Law has survived 300 years of evolving science provides much of the needed evidence that the Law is truthful and works but I will do the experiment to determine my own set of results.

I hope to answer the question:

‘Is there a link between mass and acceleration ?’

Newton’s Second Law

Newton’s Second Law is a way of finding the force that is acting on a certain object by using the known mass of the object and the projected acceleration and that the mass is inversely proportional to the acceleration.

For example, A bus keeps going forward because the forces of acceleration and friction are unbalanced but as soon as these forces become balanced than the bus will keep a steady speed.  It is this that I am going to investigate.  

The Law can be tested quite easily by using a simple test, involving a trolley, a ramp and some weights.

...read more.

Middle

A list of the equipment I will need is shown below:

  1. A Trolley
  2. A Two Metre long ramp
  3. A Ticker Timer
  4. Ticker Tape
  5. A Pulley – so when we let the weights drop there will be as little friction as possible.
  6. String
  7. 5x 1Newton weights

We will measure the acceleration caused by a certain weight three times to make sure we get the right results.

The Variables

  • Mass
  • Acceleration
  • Force        
  • Friction

See page one for variables being tested.

How to make it a fair test

To make the experiment fair, the only variable that I will change is the amount of weight that is used to pull the trolley down the runway.  All the other components i.e. length of string, height of runway, and stated variables will be kept the same.

Prediction

Based on the results that we obtained when we used Newtons Theory to work out the projected accelerations for each different weight, I would say that the more weight that is applied to pull the trolley down the ramp the more the trolley will accelerate.  This is because the trolley has an unbalanced force which means it will accelerate.

...read more.

Conclusion

1

1721.5

0.58 m/s/s

0.360

1

0.58 m/s/s

0.380

1

0.58 m/s/s

0.310

2

1821.5

1.097 m/s/s

0.811

2

1.097 m/s/s

0.702

2

1.097 m/s/s

0.705

3

1921.5

1.561 m/s/s

1.208

3

1.561 m/s/s

1.198

3

1.561 m/s/s

1.211

4

2021.5

1.979 m/s/s

1.330

4

1.979 m/s/s

1.301

4

1.979 m/s/s

1.326

5

2121.5

2.356 m/s/s

1.480

5

2.356 m/s/s

1.560

5

2.356 m/s/s

1.534

My results are highlighted in red

Below is a graph of my results.  I have used averages of the 3 recorded acceleration in the graph.

image08.pngimage09.png

...read more.

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