Chapter 11, Problem 22A

Perky (left) and Sneezlee fright) have the same mass and nicely balance at opposite ends of a seesaw. For the three positions, rank the length of the lever arm between Perky and the center of the seesaw from longest to shortest.

To determine

To rank the length of the center of the seesaw from the longest to the shortest for three positions.

Answer to Problem 22A

  $A=B=C$

Explanation of Solution

Introduction: Measuring the distance between Person P and Person S for three positions.

In all three positions, the length of the lever arm between Person P and Person S is the same. Because Person S is standing in the same position in all three figures. And, Person P is firstly half hanged then fully standing on a bench, and then completely hanged. But, in all 3 positions, Person P is at the same position i.e. at the same length from Person S.

Conclusion: The length of the lever arm between Person P and Person S is the same in all three figures $A$ , $B$ , and $C$ .