Investigative Experiment: The Law Of Conservation Of Momentum

921 Words 4 Pages
Table of Contents
Introduction 2
Method 3
Results 4
Discussion 6
Conclusion 7
Plagiarism Report 6

The law of Conservation of Momentum states that the total linear momentum of an isolated system remains constant.
This law is based on Newton’s third law (If body A exerts a force on body B, body B will exert an equal force but opposite force on body A). Thus when objects collide or explode apart, equal forces are exerted on the objects but in the opposite direction. The time of which the forces are in contact with the object is the same for both objects therefore if one object loses momentum the other object must gain an equal amount of momentum.
An isolated system is one which the only forces are between the bodies that are colliding or exploding, no outside forces must be acting. (M.Mann, 2013)

Investigative Question: Is momentum conserved during the collision of a brick and a trolley?
The momentum of the trolley before the collision will be equal to the
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This indicates that the hypothesis in the beginning of the investigation is incorrect and that momentum was not conserved. Results show that the momentum has increased; this is due to an increase in the mass, from 0.85 to 2.85. The velocity decreased from 0.59 to 0.44. Although the velocity decreased the momentum mainly increased because of the increase in mass. Body A and B, together had a greater mass than body A alone.
Trial 3 also showed deviation from the previous two trials. The velocity before the collision was 0.26m.s-1 and was 0.7m.s-1 after the collision. This was the only set of data that showed an increase in velocity after the collision. This deviation suggests that the trolley accelerates (the change in velocity) in the direction of motion after the collision. This deviation may be as a result of inaccurate measurements of the ticker

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