# An arbitrarily shaped piece of plywood can be suspended from a string attached to the ceiling. How could you use a plumb bob to find its center of mass?

##### 1 Answer

Nov 15, 2015

#### Answer:

Use the plumb bob to create two lines from two different points of suspension. The center of gravity will be the point where the two lines intersect.

#### Explanation:

If you suspend the sheet of plywood from the ceiling and let the plumb bob drop from the point of suspension, you can create a line that divides the sheet into two sides of equal weight.

Repeating this process from a second point of suspension will give you the center of gravity.