Center of Mass

Drag the blue masses and watch the red center-of-mass marker follow.

Mass AMass BMass C

You might also find these useful

T-Test CalculatorEnter two groups of numbers to see if their means differ significantly.

Complex Number PlaneMultiply two complex numbers and see how their magnitudes multiply and angles add on the plane.

Measurement Error AnalysisEnter a set of measurements and the true value to see absolute, relative, and standard errors.

Magnetic Field LinesSee how field lines curve for a single magnet and how two magnets attract or repel.