(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 65 kg climber finds himself dangling over the edge of an ice cliff, as shown in the figure below. Fortunately, he's roped to a 940 kg rock located 51 m from the edge of the cliff. Assume that the coefficient of kinetic friction between rock and ice is 5.7×10−2. What is his acceleration, and how much time does he have before the rock goes over the edge? Neglect the rope's mass.

2. Relevant equations

Rock

F_{T}- F_{f}= mass_{rock}* a

N = mass_{rock}* g

Climber

F_{T}- mass_{climber}* g = mass_{climber}* a

3. The attempt at a solution

I solved for F_{T}for the climber and then stuck this equation into F_{T}in the rock equation. Then solved for a.

a = (g(mass_{climber}- Mu(k) * mass_{rock})) / (mass_{rock}- mass_{climber})

Plugging the numbers in the equation, i get a = 0.127904 m/s^{2}My homework tells me this is wrong and I can't figure out why. any help is appreciated!

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# Homework Help: Climber hanging from a cliff

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