How Do You Find the Center of Mass With Calculus? Credit: J. Ronald Lee/Moment/Getty Images

To determine the center of mass using calculus, the area and moments about x and y must be determined. The moments are divided by the area to give the coordinates of the center of mass.

1. Determine the area of the given curve

First, find the area of the given curve. This can be done by evaluating the integral: A = |_(a..b) f(x) dx. If the area is between two curves, the area is found by evaluating the integral: A = |_(a..b) (f(x) - g(x)) dx.

2. Find the moments about x and y

To find the moment about x, use the integral: M_x = |_(a..b) ((1/2) * (f(x))^2) dx. The equation for finding the moment about y is: M_y = |_(a..b) (x * f(x)) dx. If the area is between two curves, the moments about x and y are found with the following equations: M_x = |_(a..b) ((1/2) * ((f(x))^2 - (g(x))^2)) dx, and M_y = |_(a..b) (x * (f(x) - g(x))) dx.

3. Find the coordinates for the center of mass

The coordinates for the center of mass are found by dividing the moments by the area. The x coordinate is found by the equation: x_bar = M_y / A. The y coordinate is found by the equation y_bar = M_x / A. The center of mass is (x_bar, y_bar).

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