Physics Semester 2
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Conservation of Energy
Energy can’t be made or destroyed — only changed into other forms. Memory hook: “Energy doesn’t disappear, it just changes outfits.”
Energy Transfer
When energy changes from one form into another. Memory hook: the actual “outfit change” happening.
Gravitational Field Strength (g)
How strong gravity is in a place. Memory hook: Earth = 9.8 N/kg, Moon = 1.6 N/kg — bigger planet, stronger pull.
Gravitational Potential Energy (GPE)
Energy an object has because of how high up it is. Memory hook: “Height = stored energy, ready to fall.”
Joule (J)
The unit we measure energy in. Memory hook: just think “J = energy’s units, like kg is mass’s units.”
Kinetic Energy (KE)
Energy an object has because it’s moving. Memory hook: “Kinetic = in motion” (like a kinetic sculpture that moves).
Velocity
Speed with a direction. Memory hook: speed tells you “how fast,” velocity tells you “how fast AND which way.”