Orbit of two Masses (see description below)

Check this box to see masses leave trail markers:

Physlet Problem Description

Use the animation to determine the unknown mass of the blue object. Take the mass of the larger red object to be 100 kg.

[Also, remember that you can 'mouse down' on the objects at any time to see their (x,y) coordinates displayed in the yellow area that appears in the lower left corner of the Physlet. Just click the left mouse button and hold it down to see the coordinates of the location you have clicked!]