Posted by Alan Thomas on Thursday, January 14, 2010 at 5:48pm.
A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of vi = 23 m/s. The cliff is h = 54 m above the water's surface. How long does it take for the stone to fall to the water?
With what speed does it strike the water?

Physics  bobpursley, Thursday, January 14, 2010 at 5:49pm
If the initial velocity is horizontal, it has not influence on the time of fall.
Time of fall is determined by the height, and by gravity.
h=1/2 g t^2
solve for t, time.

Physics  Alan Thomas, Thursday, January 14, 2010 at 5:50pm
Thank you.

Physics  Alan Thomas, Thursday, January 14, 2010 at 5:51pm
How would I calculate the speed?

Physics  bobpursley, Thursday, January 14, 2010 at 5:53pm
the vertical speed is
vf= g *time
the horizontal speed is the kicking speed.
Vftotal=sqrt (Vh^2+ Vvf^2)
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