Change F3 so that Fnet is zero and compare the magnitude of F3 to that of the graphical method of step 12. How do your angles match, remember one is a resultant and one is an equilibrant, angles are exact, close, far apart

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.