A 10 kg crate is pushed with 30 N against 10 N of friction. What is its acceleration?
Answer and explanation
Correct answer: B. 2.0 m/s^2, from net force 20 N / 10 kg
- Step 1: Net force = 30 - 10 = 20 N. Step 2. a = F/m = 20/10 = 2.0. Answer: 2.0 m/s^2. Why not the others: the others ignore or add friction.
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