Engineering mechanics can be divided into statics and dynamics. Basically, statics is the study of forces and their effects in equilibrium, whereas dynamics is the study of objects in motion.

Weight
The weight of a body is the force of gravity acting on that body.

Mass per unit volume
Mass per unit volume of any body is also called the density of that body

Mass
Mass is the quantity of matter in a body

Moments of forces, centre of gravity and centroids of areas
Is the product of the applied force and the moment arm (leverage distance)

Vector diagrams of forces: graphical solution

Orders of levers
First-order levers, Second-order levers and Third-order levers

Centre of gravity, centroid of areas and equilibrium
Centre of gravity, Centroids of areas and Equilibrium

Stress and Strain
Direct stress, shear stress, direct strain, shear strain, modulus of elasticity and etc

Beam Analysis – Shear Force & Bending Moment
Shear force, bending moment, shearing force and bending moment diagrams,