Question

Harold stands over a well that sits 1.5m above ground level, and
throws a stone directly upward at 8 m/s and moves out of the way.
He hears the sound of the stone hitting water 4.2 seconds after
originally throwing it upward. Ignoring time required for sound to
travel back up the well, how deep is the water level in the
well?

Answer #1

A boy drops a stone into a well and hears the splash of the
splash of the stone hitting the water
6.3 s later. If the speed of sound travels from the water level to
the top at 320 m/s, how deep is the
water below the ground?
A. 87.0 m
B. 1100 m
C. 120 m
D. 240 m
E. None of the above

A student stands at the edge of a cliff and throws a stone
horizontally over the edge with a speed of
v0 = 17.5 m/s.
The cliff is h = 26.0 m above a flat, horizontal beach
as shown in the figure.
A student stands on the edge of a cliff with his hand a height
h above a flat stretch of ground below the clifftop. The
+x-axis extends to the right along the ground and the
+y-axis extends up...

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