Posted by **Dylan** on Monday, January 28, 2013 at 8:48am.

A person standing at the edge of a seaside

cliﬀ kicks a stone over the edge with a speed

of 21 m/s. The cliﬀ is 52 m above the water’s

surface. How long does it take for the stone to fall

to the water? The acceleration of gravity is

9.81 m/s^2.

Thanks!

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