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Introductory Physics Homework Help
Need help with momentum related questions
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[QUOTE="haruspex, post: 4978551, member: 334404"] There's a bit more to it than that. As I posted, average force is ##\vec{\Delta p}/\Delta t##, not ##\Delta E/\Delta s##. Using the latter formulation would lead to the bizarre result that the average force might be different from mass times average acceleration. They do give the same result when the force is constant, but rarely otherwise. Besides, taking the vector equation ##\vec F.\vec{ds} = dE## and dividing through by ds is not really on. Sadly, questions from textbooks and teachers asking for average force given energy and distance are a regular occurrence on this forum. I do my best to enlighten the students that this is not actually valid, hoping that some will able to pass this on to their elders. [/QUOTE]
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Need help with momentum related questions
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