A car speeds up from rest to 20 meters per second in 5 seconds. What is its acceleration?
Answer and explanation
Correct answer: B. 4 meters per second squared
- Step 1: Acceleration = change in speed / time = 20 / 5. Answer: 4 meters per second squared. Why not the others: 100 multiplies the numbers and 0.25 inverts the ratio.
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