The range of resultant force of three common point forces, 5N, 6N, 9N & nbsp; acting on a plane, is______ .

The range of resultant force of three common point forces, 5N, 6N, 9N & nbsp; acting on a plane, is______ .

When the direction of the three forces is the same, the resultant force is the largest, f = 5 + 6 + 9N = 20n. The resultant force of 5N and 6N is greater than or equal to 1n, less than or equal to 11n, and 9N is within the range of the resultant force, so the resultant force of the three forces can be zero. Then the minimum value of the resultant force is 0. The range of resultant force is 0 ~ 20n