An object is dropped from a tower, T84 ft above the ground. The object's height above ground t seconds after the fall is s(t) = T84 1t2. Determine the velocity and acceleration of the object the moment it reaches the ground. The velocity of the object the moment it reaches the ground is D flr's. (Simplify your answer.) The acceleration of the object the moment it reaches the ground is D W52. (Simplify your answer.)