ch09-p084 - 84 Let m be the mass of the higher floors By...

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84. Let m be the mass of the higher floors. By energy conservation, the speed of the higher floors just before impact is 2 1 2. 2 mgd mv v gd = ¡ = The magnitude of the impulse during the impact is 22 || 2 dd Jp m v m v m g d m g W gg =Δ = Δ = = = = where Wm g = represents the weight of the higher floors. Thus, the average force exerted
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