paper 1 Flashcards
1
Q
ENERGY
A
is always conserved
cannot be created or destroyed
can be turned into mass
2
Q
An object can have energy in the following stores…
A
KINETIC ENERGY
GRAVITATIONAL POTENTIAL ENERGY
ELASTIC POTENTIAL ENERGY
THERMAL ENERGY
3
Q
Energy transfers
A
things happen when objects interact (in what we call a ‘SYSTEM’) and energy is transferred from one store to another, or between objects
e.g. if an object falls, GPE is transferred to KE.
in a closed system, GPE at top = KE at bottom
4
Q
CLOSED SYSTEM
A
no energy is transferred to (or from) the surroundings
so we say e.g. KE = GPE or KE = EPE
if there is less KE at the bottom than GPE at the top, this cannot be the case - energy must be lost to the surroundings by friction/ air resistance
