Question

multiple select question
select all that apply
the figure on the right contains six free-body diagrams. which of the diagrams represent an object that is at rest or in uniform motion (in equilibrium)?
□ f
□ a
□ e
□ c
□ d
□ b

Explanation:

Step1: Define equilibrium condition

An object is in equilibrium (at rest or uniform motion) when the net force acting on it is zero, meaning forces in each direction cancel out.

Step2: Analyze Diagram A

Leftward force, no opposing rightward force; net force ≠ 0. Not in equilibrium.

Step3: Analyze Diagram B

Equal leftward and rightward forces; net horizontal force = 0. No vertical forces. Net force = 0. In equilibrium.

Step4: Analyze Diagram C

Rightward and downward forces, no opposing forces; net force ≠ 0. Not in equilibrium.

Step5: Analyze Diagram D

Equal leftward and rightward forces; net horizontal force = 0. No vertical forces. Net force = 0. In equilibrium.

Step6: Analyze Diagram E

Upward and downward forces, no opposing horizontal forces; net vertical force = 0, but this is balanced vertical force, net force = 0. In equilibrium.

Step7: Analyze Diagram F

Equal leftward and rightward forces; net horizontal force = 0. No vertical forces. Net force = 0. In equilibrium.

Answer:

B. Diagram B, D. Diagram D, E. Diagram E, F. Diagram F