This class will cover vectors with force systems, moments of force, and practical exercises. The class will lecture on vectors with force systems, moments of force using a scalar formulation, and conclude with practical exercises, a summary, quiz, and real-life examples. For a particle to be in equilibrium, the vector sum of all forces must be zero, but for a rigid body to be in equilibrium the vector sum and sum of all torques/moments must be zero.

1. Week 2 Vectors with force system Resultants:
Objectivities of this class
1. Vectors with force systems
2. Moments of force and scalar formulation
3. Practical Exercise
- Summary, Quiz, Real-life examples
This class is lecturing in order of above objectivities.

2.  is the only condition for the equilibrium of a particle
 For a rigid body it is different case
 So is a necessary condition, but not sufficient. There is a To
rque or Moment on the body.