Introduction to Energy Vocabulary

What is Energy? Energy Vocabulary Example

שקופית: 1
Speed
How fast something is travelling. Measure in meters per second (ms-1 or m/s).
שקופית: 2
Gravity
An attractive force between objects that have a mass. It increases as the distance gets smaller and the mass increases.
שקופית: 3
Efficiency
Electrical Energy (200J)
Efficiency = 70%
Light Energy (140 J)
Thermal Energy (60J)
The proportion of the total input energy that is transferred to useful forms. Efficiency = useful energy (J) ÷ total energy (J)
שקופית: 4
Conservation of Energy
Electrical Energy (100J)
Light Energy (60J)
Thermal Energy (40J)
The idea that energy cannot be created or destroyed only transferred from one form to another.
שקופית: 5
Energy
The ability to do work (motion or change), measured in Joules (J).

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