What is the mechanical advantage of the level shown below?

a. 0.79
b. 1.27
c. 2.6
d. 3.67

the correct answer is B. 1.27

Mechanical advantage of a lever is simply the ratio of the effort arm to the load arm.Effort arm is the distance from the pivot to the point of application of force while load arm is the distance of the lord from the pivot.

therefore, in this question, the effort arm is 0.28m while the load arm is 0.22 m. MA is calculated as follows: MA=effort arm/load arm

                                                         =0.28m/0.22m=1.27

b

explanation:

1 - wave length

2 - amplitude

3 - crest

4 - trough

explanation:

duh.