Newton's Second Law Practical Report

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Prac Report

Problem: How does the increase mass affect acceleration and the force of the accelerating object?
Purpose: The purpose of the practical is to find how mass affects acceleration and how it affects also the force of the accelerating body. To do this we are going to do the ticker tape experiment where an accelerating body pulls a tape through a consistent 50 dot per second ticker timer. The acceleration body in this experiment will be a small trolley pulled by a string that is pulled by the downfall of different masses which will then tell how mass affects acceleration.
Hypothesis: As the Mass increase so will the force.
Variables:
Independent Variable – The amount of mass tied at the end of the string
Dependent Variable
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On the graph there are some minor anomalous results such as trial 3 of mass 200 gram, where the acceleration is 0.2m/s^2 closer to the 500 gram average then the average of the two other trials for 200 g force. Outlier could be caused by multiple factors such as incorrect or inconsistent method of dropping the weight or the miss positioning of the trolley creating an awkward starting angle and direction.
Conclusion: The result supports the hypothesis, that as the mass increases so will the force as there is a general trend that shows when mass is increased so is the force.
Explanation: This all happens because of the formula, Force = Mass X Acceleration. So physically when extra mass is added, the force will increase (e.g. 20 N = 2/m^2 x 10 Kg > 10 N = 2/m^2 x 5 Kg)
Theoretically if there were no resistant (e.g air resistance, friction ETC) a down falling body on Earth would accelerate at the rate of 9.8 m/s^2, this is known as the gravitational acceleration. Theoretically the force of the downfall and acceleration for 500 gram would be 9.8 m/s^2 x 0.5 kg = 4.9 N. However in this prac as the force is greatly reduced by the resistant forces such as friction between the wheel and the table or the air resistant faced by the trolley and weight, the total amount of force was reduced. Mass(grams) | Average Acceleration (m/s^2) | 500 | 0.279 | 200 | 0.012 | 100 | 0.0051 | 50 |
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