f=ma

Mass Force (N) Distance Speed (m/s) Average Time (S) Acceleration (m/s theoretically) Acceleration (m/s experiment)

Firstly, the speed was calculated by dividing the distance by time. The common formula of speed, distance and time was used to work these results out. The distance is constant at 1metre divided by the average time (measured in seconds) equals to the speed written in the units of metres per second. From working out the speed the acceleration can also be worked out. The acceleration of an object is the rate at which it’s velocity changes. It is the measure of how quickly an object is speeding. With the results of this experiment the acceleration can be calculated by dividing the speed with av

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As the mass becomes heavier the acceleration decreases.

Graph 2 shows the results for unbalanced forces against acceleration and how this is effected by the mass.

This investigation explains how Newton’s second law of motion with f=ma proves how an object will change velocity if it is pulled or pushed upon. The results collected are accurate with the exception of few unexpected results but with the procedure and method used the results collected are reliable. To conclude, the more weights that are put on the slower the cart goes down the ramp. 1 metres per second

After completing practical the results recorded can calculate that force equals to mass multiplied by acceleration (f=ma). This because if the cart with a larger mass is pushed down the ramp the cart moves slower accelerating at a smaller speed. This acceleration is directly proportional to the force.

Evaluation:

Overall I think this experiment is accurate and has clearly proven f=ma. 2N (twice as much) causing it to accelerate twice as much from 0. After solving the acceleration results they were plotted on to a graph (B). The three different masses can be compared and this is shown on the graph 1.

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Approximate Word count = 1170
Approximate Pages = 5 (250 words per page double spaced)

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