ch09-p051 - 51. With an initial speed of vi , the initial...

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51. With an initial speed of i v , the initial kinetic energy of the car is 2 /2 ic i Km v = . After a totally inelastic collision with a moose of mass m m , by momentum conservation, the speed of the combined system is () , ci c m f f cm mv m m v v mm =+ ¡ = + with final kinetic energy 2 2 22 11 1 . 2 c f f i m m vm m v §· = ¨¸ ++ ©¹ (a) The percentage loss of kinetic energy due to collision is 500 kg 1 1 1 33.3%. 1000 kg 500 kg 3 if f ii m c m KK K K m m m Δ == = −== = =
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