You walk up to a Well and look down into it. You notice that you cannot see the bottom but you happen to have a stop watch and a rock along with your 4 Kinematic Equations. Choose an appropriate equation, you drop the rock down the Well and start the stopwatch; it takes the rock 3.0 seconds to hit the water below. How deep is the Well (show all work to get credit)? 11) Given: P = F/A, and that the average pressure under a certain wing of an aircraft is 0.5 psi (lb/in2 or pound per square in) higher than the average pressure on top of the wing, and the certain aircraft weighs 100,000 lbs. Assuming that all the Lift comes from just the two wings.

a. How many square ft (ft2) does each wing have to be in order to lift the Aircraft? First solve the equation for the total wing A (Area): P = F/A => AP = A·F/A => AP = F => AP/P = F/P => A = F/P. Realize that to Lift the aircraft the upward Force must equal the weight of the Aircraft which is 100,000 lb. Also, note that the difference in Pressure is equal to 0.5 lb/in2.

b. What are the dimensions in feet of any rectangular wing that would satisfy your answer in “a”. A = L·W, Choose any Length “L” and solve for the wing’s Width.