ch06-p086 - 86. (a) Our +x direction is horizontal and is...

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(g) The condition for the chair to slide is ,max where 0.42. s xs N s Ff F μμ >= = For θ = 0°, we have ,max 100 N (0.42)(245 N) 103 N =< = = so the crate remains at rest. (h) For = 30.0°, we find ,max 86.6 N (0.42)(195 N) 81.9 N => = = so the crate slides. (i) For = 60°, we get ,max 50.0 N (0.42)(158 N) 66.4 N = = which means the crate must remain at rest. 86. (a) Our + x direction is horizontal and is chosen (as we also do with + y ) so that the components of the 100 N force G F are non-negative. Thus, F x = F cos = 100 N, which the textbook denotes
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