Answer: 20 kg·m/s.
- A 5 kg·m/s
- B 12 kg·m/s
- C 20 kg·m/s
- D 8 kg·m/s
Correct answer: C. 20 kg·m/s
Explanation: p = mv = 2 x 10 = 20 kg·m/s.
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.