Work Force (N) Work (joules) W = F x d Distance (m)

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Presentation transcript:

Work Force (N) Work (joules) W = F x d Distance (m)

Work Key Question: What happens when you multiply forces in machines?

Power Work (joules) Power (watts) P = W t Time (sec)

Energy Energy is the ability to do work. Any object that has energy has the ability to create force. Energy is measured in the same units as work. A joule is a unit of force that acts over a distance.

Potential Energy Ep = mgh Mass (kg) Potential Energy (joules) Height (m) Acceleration of gravity (m/sec2)

Kinetic Energy Ek = 1 mv2 2 Mass (kg) Kinetic Energy Speed (m/sec) (joules) Ek = 1 mv2 2 Speed (m/sec)

Energy Conservation What is energy and how does it behave? Key Question: What is energy and how does it behave?

Energy Transformations Energy transformations occur between different types of energy. radiant energy electrical energy chemical energy nuclear energy

Energy Transformations in a Power Plant Power plants convert chemical energy into electrical energy. chemical energy heat energy mechanical energy electrical energy

Energy Transformations Key Question: Where did the energy go?

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