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A stone falls from a cliff 80 m high after being thrown horizontally. Taking g as 10 m/s2, how long does it take to land?
A2 s
B3 s
C4 s
D5 s
Answer & Solution
Correct answer: C. 4 s
Vertical fall gives 80 = 5t squared, so t = 4 s, regardless of horizontal speed.
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