Calculate the ideal mechanical advantage of a car tire that has a wheel radius of 6 feet and an axle radius of 1.5 feet. PLEASE HELP, BEGGING HERE! WILL GIVE BRAINLIEST-
A. 4.5

B. 4

9. 9

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.