Answer: 5000 N.
- A 2000 N
- B 3000 N
- C 5000 N
- D 8000 N
Correct answer: C. 5000 N
Explanation: F = m x |delta_v| / t = 2000 x 10 / 4 = 5000 N.
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.