1 Administer assessment. This depends on mass and distance i.e. planet, gravity variations. Electric circuits and magnets exert forces. Universal Law of Gravitation 1 Review simple machines. Wheel and axle, inclined plane, pulleys, lever.
Complex machine uses a combination of simple machines i.e. Bicycle.
Lab- rulers, levers, move the fulcrum point 2 Machines transfer mechanical energy from one object to another. Change direction or amount of force, or the distance or speed of force to do work. Lab- pulleys systems with the spring balance 1 Friction opposes motion. Reducing friction in machines lubrication and wax. Students use rating guide to score papers.