Vector and forces Notes

In this section we cover.

• Recapitulation of vector.
• System of forces in three dimensions.
• Moment or torque.
• Couple 
• Moment of couple.
• Poinsots Reduction theorem.
• Central axis of system of forces.
• Properties of central axis of system.
• Cartesian equations of central axis of system.
• Wrench 
• Moment of force about a line.
• Null line
• Null plane and null point 
• Conjugate lines and conjugate forces
• Moment of inertia