chapt 6 (energy) Flashcards
1
Q
What are the energy stores? (6)
A
- Gravitational potential store
- Kinetic store
- Chemical store
- Internal (Thermal) store
- Elastic potential store
- Nuclear store
2
Q
Principle of energy conservation?
A
Energy cnnt be made nor destroyed. It can only be transferred from one store to another. Total energy in an isolated system remains constant.
3
Q
How do energy get transferred? (4)
A
- Mechanically: by force acting over a distance.
- Electrically: by electric current
- Heating: due to temp diff
- Propagation of waves
4
Q
definition of Work done? (1) formula? (1)
A
product of a force and the distance moved by object IN DIRECTION OF FORCE.
wd = Fd
5
Q
Definition of Power? (1) formula? (1)
A
Work done or energy transferred per unit time.
p= wd or energy / time
