Chapter 1 Flashcards
1
Q
Energy stores
A
- Gravitational potential energy
- Kinetic energy
- Elastic potential energy
- Thermal (heat) energy
2
Q
4 types of potential
A
- Electric potential
- Magnetic potential
- Chemical potential
- Nuclear potential
3
Q
Physical processes
A
- Mechanical (forces, sound waves)
- Electric current
- Electromagnetic waves
- (Heating)
4
Q
Energy transfers eventually the energy is…
A
Dissipated
5
Q
Energy store of a pendulum
A
GPE → KE → GPE
6
Q
Energy store of a car at constant speed
A
Chemical → thermal energy
7
Q
Energy store of a car braking
A
Kinetic → thermal energy
8
Q
What is work done?
A
The energy transferred by a force.
9
Q
How to measure work done?
A
Work done = force x distance
10
Q
What is work done measured in?
A
J
11
Q
What is force measured in?
A
N
12
Q
1 Joule =
A
1 Newton metre
13
Q
How to measure Gravitational Potential Energy?
A
GPE = mass x grav. field strength x height (E = m x g x h)
14
Q
How to measure Kinetic Energy?
A
KE = 0.5 x mass x velocity2
(E = 0.5 x m x v2)
15
Q
How to measure Elastic Potential Energy?
A
E = 0.5 x spring constant x extension2
(E = 0.5 x k x e2)
