Mechanics and Engineering

Mechanics is the branch of physics concerned with the motion of bodies and the forces that cause or resist that motion. Engineering applies these principles to design machines, structures and systems. Interactive animations are widely used in teaching because many mechanical phenomena — oscillating linkages, rotating shafts, flowing fluids — are easier to grasp when their changing states are shown over time rather than described in static diagrams.

Classical mechanics divides broadly into statics, which studies bodies in equilibrium, and dynamics, which studies bodies in motion. Kinematics describes motion in terms of position, velocity and acceleration without reference to its causes, while kinetics relates motion to the forces and torques acting on a body. Closely related topics include vibration, the periodic motion of elastic systems such as springs and beams, and the analysis of machine elements like cams, cam followers and valve gear that convert one form of motion into another.

Engineering animations often extend into fluid dynamics, the study of liquids and gases in motion, and aerodynamics, which examines air flow around bodies and is investigated experimentally in wind tunnels. Thermodynamics, the study of heat and energy transfer, underlies the operation of engines such as the idealised Carnot engine. Instruments like the manometer measure pressure, while concepts such as strain describe how materials deform under load. Together these subjects form the foundation of mechanical engineering.

Frequently asked questions

What is the difference between kinematics and kinetics?

Kinematics describes how an object moves — its position, velocity and acceleration — without asking why. Kinetics studies the forces and torques that produce that motion.

What is a cam follower?

A cam follower is a machine part that rides against a rotating cam and translates the cam's profile into a controlled reciprocating or oscillating motion, as used in engine valve gear.

Why use animations to study mechanics?

Many mechanical systems change continuously over time, so an animation can show how parts move, interact and transfer energy in ways that a fixed diagram cannot convey.