ch09-p092 - 92. One approach is to choose a moving...

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92. One approach is to choose a moving coordinate system which travels the center of mass of the body, and another is to do a little extra algebra analyzing it in the original coordinate system (in which the speed of the m = 8.0 kg mass is v 0 = 2 m/s, as given). Our solution is in terms of the latter approach since we are assuming that this is the approach most students would take. Conservation of linear momentum (along the direction of motion) requires 01 12 2 1 2 (8.0)(2.0) (4.0) (4.0) mv m v m v v v =+ ¡ which leads to vv 21 4 =− in SI units (m/s). We require 22 2 2 2 2 11 2 2 0 1 2 1 1 1 1 16 (4.0) (4.0) (8.0)(2.0) 2 2 2 2 Km v m v m v v v §· §
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