A body moving at 2 m/s accelerates uniformly at 6 m/s² for 5 s. What is its final speed?
Answer and explanation
Correct answer: A. 32 m/s
- Step 1: Use v = u + at. Step 2. v = 2 + 6 × 5 = 32 m/s. Answer: 32 m/s. Why not the others: 30 m/s is what you get if you forget the initial speed. 8 m/s is what you get if you forget to multiply the acceleration by time. 16 m/s is what you get if you multiply the initial speed by time.
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