Answer: 10/3 m/s2.
- A 10/3 m/s2
- B 5 m/s2
- C 10 m/s2
- D 20/3 m/s2
Correct answer: A. 10/3 m/s2
Explanation: Net force = 2 x 10 = 20 N. Total mass = 1+2 = 3 kg. a = 20/3 m/s2.
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.