# Topic 1 Momentum Basics Module 4

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- Created by: Aoife
- Created on: 15-01-13 21:06

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- Momentum
- Definition= mass x velocity
- Newton's 2nd: The rate of change of momentum is proportional to the resultant force and in opposite direction
- F= (mv-mu) / t
- Ft (Ns) = impulse
- v-u / t = a so F=ma
- k=1 defined

- F= (mv-mu) / t
- M1U1 + M2U2 = M1V1 + M2V2
- In an explosion, put = to zero!
- Conservation of Linear Momentum : The total momentum of a system before and after a collision = constant provided no external force acts.

- In an explosion, put = to zero!
- Conservation of Linear Momentum : The total momentum of a system before and after a collision = constant provided no external force acts.
- Constant mass changing v so F= dP/t
- Constant v changing mass so F=dP/t

- Constant mass changing v so F= dP/t
- Constant v changing mass so F=dP/t

- Elastic collisions KE conserved

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