If the fulcrum of a balanced scale is shifted to the left, what type of adjustment must be made to rebalance the scale?

Three point masses are at the points , and

and a point mass is at the point .

How far from the origin is the center of mass of the system?

If two masses, and are placed on a seesaw of length , where must the fulcrum be placed such that the seesaw remains level?

Doing which of the following would allow you to find the center of mass of an object?