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A ball is thrown at 20 m/s at 30 degrees above the horizontal on level ground. With g = 10 m/s2, its time of flight is:
A2 s
B1 s
C3 s
D4 s
Answer & Solution
Correct answer: A. 2 s
T = 2u sin theta / g = 2 x 20 x 0.5 / 10 = 2 s.
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