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sergejj [24]
4 years ago
7

A child throws a penny straight down into a wishing well. The penny's initial speed is 2 m/s. If the penny takes 3 seconds to hi

t the water, how deep is the well?
Physics
1 answer:
lidiya [134]4 years ago
8 0
L = v_0\cdot t + \frac{1}{2}gt^2

In this case v_0 = 2 m/s and t=2
Putting everything in will be

L = 2\cdot 3 + \frac{1}{2}\cdot9.82\cdot 2^2 = 6 + 19.64 = 26

So the answer is 26 m.
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