a) Draw a free body diagram for the rod clearly showing all forces and where they are applied. Hint: There are four forces! b) On your diagram, draw and label the line of action and lever arm for the weight force about point A.
Rotational Equilibrium And Rotational Dynamics
In physics, the state of balance between the forces and the dynamics of motion is called the equilibrium state. The balance between various forces acting on a system in a rotational motion is called rotational equilibrium or rotational dynamics.
Equilibrium of Forces
The tension created on one body during push or pull is known as force.
One end (A) of a thin rod rests on a floor, with coefficient of static friction μs.
The other end (B) of the rod leans against a frictionless wall.
The rod has a length of L and a mass of m. The rod has a uniform density, so the center-of-mass is a distance L/2 from either end.
The rod does not move.
variables only (m, g, L, θ, μs)
- a) Draw a free body diagram for the rod clearly showing all forces and where they are applied. Hint: There are four forces!
- b) On your diagram, draw and label the line of action and lever arm for the weight force about point A.
- c) What is the torque produced by the weight force about point A?
- d) Using static equilibrium equations, find the three support forces (two at A, one at B).
- e) Given the coefficient of static friction μs, what is the smallest possible angle before the rod starts to move?
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