Balance Scale: The five elements of a lever, understanding the fulcrum and lever arm

Trolley: Differences between static friction, sliding friction, and rolling friction

Slingshot: Conversion between elastic potential energy and kinetic energy

Gravity Car:Gravitational potential energy and the three elements of force

Reciprocating Saw The movement of the slider-crank linkage

Ferris wheel Belt drive and its characteristics analysis

Crane: Knowledge about fixed pulleys and movable pulle

Gyro Launcher: Gear transmission and calculation of transmission ratio

Swing: The stability of the triangular structure

Tank: Characteristics of chain drive and adjusting the tightness of the chain

Wipers Linkage drive and quadrilateral instability

Swing Ride Centripetal force and centrifugal motion

Rubber Band Powered Car: Application of multi-level gear drive

Treadle Sewing Machine: Combined application of mechanical power transmission methods