A falling stone accelerates at a constant rate of 10 m/s2
. It is
dropped from rest down a deep well, and 3 s later a splash is
heard as it hits the water below.
a) How fast will it be moving as it hits the water?
b) What will be its average speed over the three seconds?
c) How deep is the well?
d) What have you assumed about the speed of sound?
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