Piston 1 has a diameter of 0.34 in. Piston 2 has a diameter of 1.0 in. In the absence of friction, determine the force, necessary to support the 500 lb weight over piston 2. I used F(1) = pi(r1^2)/pi(r2^2)*F(2) and got the wrong answer. I used radii of .17in and .5in. Is that the right formula? Do I need to convert the units to something else?