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What is work?
Work is done when a force moves an object over a distance; can add or remove energy from a system
What is work measured in?
Joules (J)
How is displacement related to work
If there is no displacement, there is no work
Work and Internal/External forces
Work can only change the total energy if it is done by an external force
Types of Energy
Gravitational Potential, Kinetic, Elastic Potential Energy (spring)
What is GPE
Gravitational Potential Energy. Due to vertical height
What is KE
Kinetic Energy. Energy of motion
What is EPE
Elastic Potential Energy. Stored in springs
Closed System
is not affected by external forces. Depends on what you consider the system
What is Power
Rate of change of energy. Work/Time
What is the unit of Power
Watts (W)