lecture9-10_template_B

lecture9-10_template_B - F chunk 1 on apple + F apple on...

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Today: Forces Newton’s laws of motion Gravitational force Normal force Friction Tension Spring force General method for solving force problems The free body diagram
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Do stop pulling the cat's tail, Darling.“ "I'm not pulling Mummy, Kitty's pulling!" How does the magnitude of the force that Darling the daughter exerts on Kitty the cat compare with the force that Kitty exerts on Darling? A. | F Darling on Kitty | > | F Kitty on Darling | B. | F Darling on Kitty | = | F Kitty on Darling | C. | F Darling on Kitty | < | F Kitty on Darling |
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F earth on apple F apple on earth Newton's Third Law: F earth on apple = - F apple on earth Forces on Forces on apple: chunks of earth:
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Unformatted text preview: F chunk 1 on apple + F apple on chunk 1 + F chunk 2 on apple + F apple on chunk 2 + F chunk 3 on apple + F apple on chunk 3 + .................... + .................... + F chunk N on apple F apple on chunk N It only seems reasonable that each term F chunk i on apple and F apple on chunk i on either side should be equal, so the sums must be equal. "Proof": Break earth up into N apple-sized chunks: F earth on apple F apple on earth m Which of the following forces are 3rd-law interaction pairs? A. Weight W of mass m and tension T of rope B. W and gravitational force of mass m on earth C. Tension T and force of mass m on rope D. Two of the above E. Three of the above...
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This note was uploaded on 10/27/2010 for the course PHYS 2207 at Cornell.

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lecture9-10_template_B - F chunk 1 on apple + F apple on...

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