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Microsoft PowerPoint - Knight Ch 7 - newton's third law notes

# Microsoft PowerPoint - Knight Ch 7 - newton's third law notes

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1 An interaction is the ________ influence of two systems on each other. 8.2 This is an action _________ pair. One of these forces can not exist without the other. For every action there is an equal but ____________ reaction. Newton’s Third Law – Chapter 7 Identifying Action Reaction Pairs 1. Draw each object separately. 2. Identify ______________ force. 3. Identify the action/reaction pairs. 4. Identify the objects that are in the system of interest. 5. Draw a ___________________ diagram for each system of interest. Propulsion The force causing the motion points ___________ to the direction of motion. Newton’s Third Law Every force occurs as one member of an action/reaction pair of forces. •Two member of an action reaction pair act on __________ objects. •The two members of an action/reaction pair are equal in magnitude but opposite in direction:

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Unformatted text preview: magnitude but opposite in direction: F A on B = ____________ 2 Tension The man pulls with a force of 100N and the wall pulls back ___________. The man pulls with a force of 100N and the girl pulls back with a force of 100N. The tension in the rope has is ________________ Pulleys In problems like this we assume that the string is ___________ and that the pulley is _______________. In doing so, we see that T S on A = T S on B . The tension remains ___________. Therefore we can draw the free body diagram as if we are dealing with two separate objects. 3 m 2m F T = 12N Scenario 1 5m a F = _____________ Scenario 2 T F-T = __________ m = 1.0 kg What is the acceleration? Simultaneously solving 1 and 2 F = (5m)a 1 F-T = (2m)a 2 1-2 ________________ a = 4 m/s...
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Microsoft PowerPoint - Knight Ch 7 - newton's third law notes

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