Lesson: Moments in 3D
In this lesson, we will learn how to find the moment of vector forces acting on a body about a point in 3D.
Sample Question Videos
Worksheet: 20 Questions • 2 Videos
The moment of the force about the origin is , where and . Given that the force passes through a point whose -coordinate is 4, find the and coordinates of the point.
If the force is acting at a point whose position vector, with respect to the origin point, is , and the components of the moment of the force about the -axis and the -axis are 73 and 242 units of moment, respectively, find the values of and .
The forces and act along and , respectively, as shown in the figure. Given that , , and are a right system of unit vectors in the directions of , , and , respectively, find the sum of the moments of the forces about point in newton-metres.