Question 1191829
A log is floating on swiftly moving water. A stone is dropped from rest from a 75-m high bridge and lands on the log as it passes under the bridge. 
(a) What is the velocity of the stone when it lands on the log?
Using 10 m/sec/sec for gravity:
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s = at^2/2 = 75
5t^2 = 75
t = 5 seconds to impact.
v = at = 10*5 = 50 m/sec
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(b) How long does it take the stone to reach the log?
5 seconds as in (a)
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(c) If the log moves with a constant speed of 5.0 m/s, what is the horizontal distance between the log and the bridge when the stone is dropped?
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Find the hypotenuse with sides of 25 & 75 meters