Posted by **beatriz** on Thursday, December 2, 2010 at 12:01pm.

A stone is dropped from the upper observation deck (the space deck) of the CN Tower, 450m above the ground.

(a) How long does it take the stone to hit the ground?

(b) If the stone is thrown downward with a speed of 5m/s, how long does it take to reach the ground?

- calculus -
**dg**, Thursday, September 20, 2012 at 7:42am
dfg

- calculus -
**Anonymous**, Wednesday, May 20, 2015 at 11:41pm
jygvuhbj

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