Answer: 250 N.
- A 25 N
- B 50 N
- C 250 N
- D 500 N
Correct answer: C. 250 N
Explanation: F = (n x m x v) / t = 10 x 0.05 x 500 = 250 N (per second).
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.