Homework Help: Physics

Posted by Julia on Sunday, March 10, 2013 at 9:55pm.

A box is held against a wall (not resting on the ground). What minimum horizontal force will JUST prevent the 5.0kg box from sliding if the coefficient of friction betweent he wall and the box is 0.65?

Physics - Damon, Sunday, March 10, 2013 at 9:58pm
force down = m g
normal force = F
up force = .65 F
so
.65 F = 5 * 9.81
F = 75.5 Newtons

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