Answer: 500 N.
- A Less than 500 N
- B 500 N
- C More than 500 N
- D Zero
Correct answer: B. 500 N
Explanation: At constant velocity, a = 0. N = mg = 500 N. Weight feels normal.
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.