Center of Mass (COM) Calculator
Calculate the precise coordinates for the balance point of multiple objects.
Calculation Results
What is the Center of Mass (COM)?
In physics, the Center of Mass (COM) is a unique point where the weighted relative position of the distributed mass sums to zero. Essentially, it is the point at which an object or a system of objects can be balanced. If a uniform force is applied to the system, it will move as if all its mass were concentrated at this single point.
The Formula for COM
To find the coordinates of the center of mass for a discrete system of particles, we use the following formulas for each dimension:
Y_com = (m1*y1 + m2*y2 + … + mn*yn) / Total Mass
How to Use This Calculator
- Define Your Masses: Enter the mass of each individual object (using any consistent unit, such as kilograms or grams).
- Assign Coordinates: Place your objects on a grid and enter their X and Y positions.
- Analyze the Result: The calculator will provide the precise coordinate where the system is perfectly balanced.
Real-World Example
Imagine a seesaw with a 20kg child sitting 3 meters to the left of the pivot (X = -3) and a 40kg adult sitting 1.5 meters to the right (X = 1.5). By calculating the COM, engineers can determine the stability of structures, the rotation point of planets, or the center of gravity for vehicles to prevent tipping.
Difference Between Center of Mass and Center of Gravity
While often used interchangeably, the Center of Mass depends strictly on the distribution of matter. The Center of Gravity is the point where the force of gravity appears to act. In a uniform gravitational field (like on the surface of Earth), these two points are identical. However, in space or varying gravity fields, they can technically differ.