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A body falls with s = 4.9t^2 metres. Find its average velocity over the first 2 seconds.
A19.6 m/s
B14.7 m/s
C4.9 m/s
D9.8 m/s
Answer & Solution
Correct answer: D. 9.8 m/s
Distance in 2 s is 19.6 m, and 19.6 divided by 2 gives 9.8 m/s.
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