- #1
Amurri9030
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Homework Statement
Two masses are connected by an inelastic string over a frictionless pulley. M1 is 4 kg and the coefficient of static friction between M1 and the inclined plane Us = 0.25. What minimum and maximum amount of mass can M2 have so that M1 remains stationary on the plane? (In the given picture θ equals 30 degrees.
Homework Equations
F1y = F1 Sin 30
F1y = F1 sin 30 = mg
F1 = mg / sin30
The Attempt at a Solution
Im having an extremely difficult time understanding the concept of pulleys with forces. Am i simply taking the 4kg / cos 30 degrees = 5.0N and then taking 5.0N Sin 30 Degrees? I am very lost and don't understand where the coefficient of friction plays a role! Please help!