ch12-p040

# ch12-p040 - 40 Let x be the horizontal distance between the...

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Substituting the values given in the problem statement (with 22 7.58 m aL h =− = ), the fraction of ladder climbed is () ( / 3 ) (9.3 m)(0.53)(72 kg 45 kg) (7.58 m /3)(45 kg) (72 kg)(7.58 m) 0.848 85%. s hM m am x aM a μ +− == =≈ 40. Let x be the horizontal distance between the firefighter and the origin O (see figure) that makes the ladder on the verge of sliding. The forces on the firefighter + ladder system consist of the horizontal force w F from the wall, the vertical component py F and the horizontal component px F of the force p F G on the ladder from the pavement, and the downward gravitational forces Mg and mg , where M and m are the masses of the firefighter and the ladder, respectively. Since the system is in
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## This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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