- #1
songoku
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Homework Statement
an inclined plane with angle 30 degrees has a mass on it. The static friction coefficient is 0.2 and the mass is 2 kg. The system then rotated to form a circular path with radius 3 m. Find the angular frequency so the mass will stay stationary.
Homework Equations
The Attempt at a Solution
i have drawn the free body diagram and i got that before the system rotated, the mass is moving downwards.
i got the forces that contributed for centripetal force when it is rotated, which is mg sin 30 and friction, but i think i can't use the static friction because it's moving. i should use kinetic friction instead, but there is no information on the question.
i try to use the static friction and got the answer ( 1.03 ), but there is no such answer on the choices...
thx a lot