Week 5- Lecture 18

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University of California, Los Angeles *

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1A

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Physics

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Oct 30, 2023

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PHYSICS 1A Lecture 18 April 26, 2022 Pr. Gabriel Freiman UCLA
CONTENT 1. Warm-up exercise 2. Introduction to linear momentum 3
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4
5 More exercises on potential energy
6 More exercises on potential energy
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7 More exercises on potential energy BOTTOM X 0 W q F Spring
8 More exercises on potential energy (At the BOTTOM)
9
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10 Linear Momentum
11 Linear Momentum https://phet.colorado.edu/sims/html/collision-lab/latest/collision-lab_en.html
12 Linear Momentum
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13 Linear Momentum
14 Linear Momentum
15 Transfer of Linear Momentum Examples
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16 Transfer of Linear Momentum Examples
17 Transfer of Linear Momentum Examples
18
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19 Conservation of momentum
20 Conservation of momentum
21 Conservation of momentum
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22 Conservation of momentum Even if we don’t know the internal forces acting between objects, we can still calculate the overall momentum P. The overall momentum P when Sum of External Forces is zero (cf. example of the skaters):
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23
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24 Second law of Newton Revisited so
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25 Second law of Newton Revisited The net force acting on a particle equals the rate of change of momentum of the particle.
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26 Second law of Newton Revisited If the Sum of external forces is « 0 », will the linear momentum change ?
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27 Second law of Newton Revisited If the Sum of external forces is « 0 », will the linear momentum change ? The change in linear momentum is « 0 » Linear momentum will be constant both in magnitude & direction
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28 Impulse-Momentum theorem Unit: N.s or kg.m/s
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29 Impulse-Momentum theorem
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30 Impulse-Momentum theorem
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31 Impulse-Momentum theorem
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32 Impulse-Momentum theorem
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33 Impulse-Momentum theorem
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34
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