Select all the answers that are true about force analysis. O A single link rotating about a point can be estimated as a point mass at some distance from the

center of rotation. O The radius of gyration is a radius at which an equivalent point mass must be placed to have the same moment of inertia as an original body. For any planar link you will get 4 equations from applying newton's 2ndlaw. O You only need to draw a FBD sometimes. O Newton's 2nd states that "The time rate of change of momentum of a body is equal to the magnitude of the applied force"