PHYSICAL SCIENCE For Exercises 21-23, use the following information.
Mr. Kaminksi plans to dislodge a tree stump in his yard by
using a 6-foot bar as a lever. He places the bar so that 0.5 foot
tree stump
extends from the fulcrum to the end of the bar under the tree
fulcrum
stump. In the diagram, b represents the total length of the bar
and t represents the portion of the bar beyond the fulcrum.
mm
3 sm
21. Write an equation that can be used to calculate the
mechanical advantage.
22. What is the mechanical advantage? 5 m
23. If a force of 200 pounds is applied to the end of the lever, what is the force placed on the