problem08_24

# University Physics with Modern Physics with Mastering Physics (11th Edition)

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8.24: Let Rebecca’s original direction of motion be the x -direction. a) From conservation of the x -component of momentum, , kg) 0 . 65 ( 53.1 m/s)cos kg)(8.0 (45.0 m/s) kg)(13.0 0 . 45 ( x v + ° = So s. m 67 . 5 = x v If Rebecca’s final motion is taken to have a positive - y component, then s. m 43 . 4 kg) 0 . 65 ( 53.1 sin s) m kg)(8.0 0 . 45 ( - = ° - = y v Daniel’s final speed is = + 2 2 y x v v s, m 20 . 7 s) m 43 . 4 ( s) m 67 . 5 ( 2 2 = - + and his direction is arctan
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Unformatted text preview: ( 29 °-=-38 67 . 5 42 . 4 from the -x axis, which is ° 1 . 91 from the direction of Rebecca’s final motion. b) 2 2 2 s) m (13.0 (45.0) 2 1 ) s m (7.195 kg) . 65 ( 2 1 s) m (8.0 kg) . 45 ( 2 1-+ = ∆ K J. 680-= Note that an extra figure was kept in the intermediate calculation....
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