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18 March, 00:24

Assuming no air resistance, how far will a 0.0010 kg raindrop have fallen when it hits the ground 30.0 s later. Assume g = 9.8 m/s2.

a) 294 m

b) 4410 m

c) 8820 m

d) 44,000 km

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Answers (1)
  1. 18 March, 02:01
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    D = (1/2) ·at²

    where d is the distance fallen, a is the acceleration (g in this problem), and t is the time

    d = (1/2) · (9.8 m/s²) · (30 s) ² = (1/2) · (9.8) · (900) m

    d = 4410 m

    The answer is b) 4410 m

    Note: the mass of the raindrop is irrelevant since the acceleration due to gravity is independent of mass. (Galileo's Leaning Tower of Pisa experiment)
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