Mechanical Work:
Applying a force over a distance, AKA moving something.
The magnitude of work is:
Work = force * distance
Unit of Work:
Joule
1 J = 1 N*m
Conservation of Energy:
Energy cannot be destroyed or created
Energy:
The ability to do work
OR
Generate heat 🙁
Mechanical Energy:
The energy is due to the motion of an object.
System:
A portion of the universe we care about
All forces in the system are INTERNAL
Conservative Forces:
Conserve means conserve MECHANICAL energy.
Forces where the path of the object doesn’t matter, just the beginning and the end.
Power:
Rate of change of energy, AKA how much energy is being put INTO a system over time.
Unit:
Watt (W) = J/s
Good conversions to know:
P = E/t
E = P*t
E/t = P