P1 Conservation and dissipation of energy Flashcards
1
Q
Name the eight energy stores
A
- Kinetic
- Gravitational potential
- Elastic potential
- Thermal
- Chemical
- Nuclear
- Magnetic
- Electrostatic
2
Q
Name the four ways in which energy can be transferred
A
- Heating
- Waves
- Electric current
- Mechanically (by force)
3
Q
What is a closed system?
A
A system where no energy can be transferred to or from the surroundings – the total energy in the system stays the same
4
Q
What is work done?
A
Energy transferred when a force moves an object
5
Q
What is the unit for energy?
A
Joules (J)
6
Q
What is the kinetic energy equation?
A
kinetic energy = 0.5 x mass x speed²
7
Q
How to calculate elastic potential energy
A
elastic potential energy = 0.5 x spring constant x extension²
