Answer: No net force acting on it.
- A No velocity
- B No net force acting on it
- C No mass
- D Constant acceleration
Correct answer: B. No net force acting on it
Explanation: Equilibrium means the vector sum of all forces = 0, so net force = 0.
Free-body diagram of a block on an incline: weight (mg) resolves into mg sinθ along the slope and mg cosθ into the slope, balanced by the normal force N and friction f.
Concept context
Newton's three laws, friction, circular motion, and free body diagrams.