# Exercise 8 - b By how much did the total kinetic energy of...

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Exercise 8.40 (Online homework) 1. Variables a. = = ms mass Sam 79Kg b. = = ma mass Abigail 52Kg c. = = . * °* + . * °* vfs final velocity of sam 5 6 cos37 i 5 6 sin37 j d. = = . * °* - . * °* vfa final velocity of abigail 9 6 cos24 i 9 6 sin24 j 2. Execution a. What is the speed of each person before the collision? e. : * = * . * °+ * . * °→ = . x direction ms vis 79 5 6 cos37 52 9 6 cos24 vis 10 2ms f. : * = * . * °- * . * °→ = . y direction ma via 79 5 6 sin37 52 9 6 sin24 via 1 22ms g. (These values mastering physics accepted as correct)
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Unformatted text preview: b. By how much did the total kinetic energy of the two people decrease during the collision? h. =-+-= .-. + .- . =-∆K ms2vfs2 vis2 ma2vfa2 via2 7925 62 10 22 5229 62 1 222 513J i. Mastering physics does not accept this value. It says the correct value is -549J. I think mf is wrong… or did I make a mistake? If mf is wrong could you fix this exercise? j....
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