The center of mass is the point in a body where the entire mass is assumed to be concentrated. A force applied to it causes the body to accelerate without developing torque. A body's weight can be represented by an equivalent force acting at its center of mass. If it is composed of an infinite number of particles, then each particle will have a gravitational force acting on it. Recall the coordinates of the center of gravity of any body. Substituting for W and dW gives the location of the center of mass. If the body's density is not constant, the equation gets further simplified. The center of mass coincides with the center of gravity if the gravitational acceleration is constant. Knowing the center of mass is important when designing a car, as it is essential to ensure its center of mass is low to the ground for stability.