If a body falls under gravity with s = 4.9 t² (m), the average velocity between t = 1 and t = 2 seconds is:
A14.7 m/s
B9.8 m/s
C19.6 m/s
D4.9 m/s
Answer & Solution
Correct answer: A. 14.7 m/s
(s(2) − s(1))/(2−1) = (19.6 − 4.9)/1 = 14.7 m/s.
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