1Name the eight energy stores:
chemical
kinetic
gravitational
elastic
thermal
magnetic
electrostatic
nuclear
2Name the four energy transfers:
mechanical working
electrical working
heating
radiation
3What is Work?
It is the amount of energy transferred
4What is the law of the conservation of energy?
Energy cannot be created or destroyed, only transferred
5Efficiency equals
(useful energy output/total energy input) x 100
7Work done equals
force x distance moved
8Gravitational potential energy equals
mass x gravitational field strength x height
10Kinetic energy equals
1/2 x mass x speed squared
12GPE at top = KE at bottom
GPE is transferred into KE
13Factors affecting thinking distance:
tiredness
drugs
alcohol
distractions
14Factors affecting braking distance:
quality of brakes
quality of tyres
weather conditions (icy or wet roads)
road quality
mass of vehicle
15Stopping distance equals
thinking distance + braking distance
16What is Power?
The rate at which something does work
17What is Power measured in?
Watts
18Power equals
Work done/time taken
Energy transferred/time taken
19Mass
the amount of matter in an object
20Weight
the measure of the force of gravity on an object
21Weight equals
mass x gravitational field strength
22Hooke's Law
The extension is directly proportional to the force
23Does a metal spring follow Hooke's Law?
Yes
24Does an elastic band follow Hooke's Law?
No
25Pressure equals
Force/Area
26Pressure difference equals
height x density x gravitational field strength
27Density equals
mass/volume