Work & Machines — Chapter overview · Physical Science: Matter, Forces & Energy, Grade 8
Explain how machines transfer energy, trade force for distance, and improve useful output.
Chapter question
How can a machine make a task easier without creating energy?
Units in this chapter
- Unit 6.1 · Work: Transferring Energy with a Force
I can identify when a force does work on an object.
- Unit 6.2 · Levers, Ramps & Pulleys
I can describe how a simple machine changes force or its direction.
- Unit 6.3 · Mechanical Advantage
I can calculate actual mechanical advantage from measured input and output forces.
- Unit 6.4 · Efficiency & Improving a Design
I can calculate efficiency using useful output energy and input energy.
- Unit 6.5 · Power: The Rate of Energy Transfer
I can calculate energy-transfer rate in watts and distinguish power from energy.