A 4 kg trolley is pulled forward by a force of 60 N while friction of 20 N acts against it. What is its acceleration?
Answer and explanation
Correct answer: C. 10 m/s
- Step 1: Net force N.
- Step 2: m/s.
Answer
10 m/s.
Why not the others: 15 m/s: friction is ignored. 20 m/s: friction is added to the pulling force. 40 m/s: the net force is not divided by the mass.
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