Posted by jim on Sunday, February 19, 2012 at 4:32pm.
A rock is dropped form the top of a cliff. It takes 12 seconds to hit the ground.
What is the height in feet of the cliff??
How fast is the rock moving when it hits the ground?

pre calc  jeremy lin 2k13, Sunday, February 19, 2012 at 4:48pm
swag swag

pre calc  Reiny, Sunday, February 19, 2012 at 5:04pm
distance = 16t^2 , here t is in seconds and distance is in feet
distance = 16(12^2) = 2304 feet