A 5 kg block on a frictionless incline at 30° is pulled by a rope parallel to the incline with a force of 50 N. What is the acceleration of the block? (g = 9.8 m/s²)
Correct answer: B. 3.62 m/s²
- A. 2.04 m/s²
- B. 3.62 m/s²
- C. 5.18 m/s²
- D. 7.36 m/s²
Explanation
Net force = F - mg sinθ = 50 - (5 × 9.8 × sin30°) = 50 - 24.5 = 25.5 N. Acceleration = Fnet / m = 25.5 / 5 = 5.1 m/s².
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