Question

multiple choice question
after pushing a couch across a floor to the right, against friction, you cease pushing. which free-body diagram correctly depicts the forces on the couch immediately after you have stopped pushing it, but before the couch comes to a full stop?
○ d
○ e
○ c
○ b
○ a
○ f

Explanation:

Step1: Identify vertical forces

Gravitational force (downward) and normal force (upward) act on the couch; they are equal in magnitude, so vertical arrows are same length.

Step2: Identify horizontal forces

After stopping pushing, only kinetic friction acts (opposing the couch's rightward motion, so leftward). No rightward pushing force, so only a leftward horizontal arrow.

Step3: Match to diagram

Diagram C has equal vertical arrows (up/down) and only a leftward horizontal arrow, matching the force conditions.

Answer:

C