# Verify the conservation of momentum law, therefore find change in kinetic energy and momentum 0.

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Introduction

Momentum and energy changes in one-dimensional collisions

Physics HL

Introduction:

Conservation of momentum is one of the most important and universal of the conservation laws of physics; it holds true even in situations where modern theories of physics apply. That is amazingly useful because it means that ONE can tell what is going to happen after a collision before it has taken place.

Law of conservation of momentum: when two or more objects act on each other, their total momentum remains constant, provided no external forces are acting.

Law of conservation of energy: Energy is never destroyed; it is just converted from one form to another. body in motion possesses kinetic energy.The kinetic energy possessed by a body depends on itsmassand itsspeed.

Purpose: To verify the laws stated above, therefore find change in kinetic energy and momentum 0.

Hypothesis

Middle

Momentum of a body of mass m, moving with velocity, is given by p=mv.

The units of momentum are kgms-1

i.e m1v1 + m2v2 = m1v1 + m2v2

E.g. Total momentum= mass x velocity of trolley A + mass x velocity of trolley B

200 g . + 200g .

Law of conservation of momentum,

Conclusion

- Take uncertainty of 1% in every single piece of data, final result will then be a lot more accurate, but time limits.
- Make more trials to verify laws, more than 4 times at least.
- Take uncertainty in consideration more carefully following rules of finding uncertainties.
- Describe method in more details so that anyone can follow it.
- Make sure there are no time limits next time.
- Draw more diagrams to show apparatus after each step.

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

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