The distance from the ground to the floor of the trailer is 22 inches. The length of the ramp is 44 inches. What is the mechanical advantage of this simple machine? A.
1/2
B.
2
C.
1/3
D.
22

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve