A girl exerts a horizontal force of 115 N on a crate with a mass of 36.2 kg. (a) If the crate doesn't move, what's the magnitude of the static friction force (in N)?
(b) What is the minimum possible value of the coefficient of static friction between the crate and the floor? (Assume the crate remains stationary.)
a) if the crate does not move, then the frictional force must equal the applied force.
F=f
115= f
b) f= uN = umg
u is the coefficient of static friction
115= u*36.2*9.81
u= 0.323
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