alleryA stone is dropped from rest (g = 10 m/s squared). What is its speed after 3 s of free fall?
A15 m/s
B10 m/s
C45 m/s
D30 m/s
Answer & Solution
Correct answer: D. 30 m/s
Starting from rest, v = g t = 10 x 3 = 30 m/s.
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