Explore and recognize that the effectiveness of a lever depends on the arrangement of the pivot point, effort and load.
Explore and recognize that the turning ratio of one pulley to another is determined by the size of the pulleys.
Identify a wheel and axle as a simple machine and where friction might be found.
Explore and recognize that how fast or how slowly one gear makes another turn depends on the number of teeth on the gears and their position.
Simple Machines – Principle Models: Gears
The gear is a simple machine that can be used to efficiently transfer force and motion.
Simple Machines – Principle Models: Wheels and Axles
The wheel and axle is a simple machine consisting of a big wheel and a small axle, which is secured to one another, to create movement.
Simple Machines – Principle Models: Levers
The lever is a simple machine, a rigid bar or solid Object, that is used to transfer force.