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TASPhysicsQuick questions
Unit 3: Gravity and Electromagnetism
Quick questions on Work, energy and power - TCE Physics (Tasmania)
3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is work done by a force?Show answer
Work is done when a force moves its point of application through a distance. Only the component of force along the displacement does work:
What is conservation of energy?Show answer
Energy cannot be created or destroyed, only transferred or transformed. In a system with no friction, mechanical energy is conserved, so the sum of kinetic and potential energy stays constant:
What is power?Show answer
Power is the rate at which work is done or energy is transferred:
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