Formulas Flashcards
(19 cards)
What is work done?
Work done = force applied x distance moved in the direction of force
Work Done = F x S
Force applied to a spring
Spring constant x extension
What does distance equal ?
Speed x time
GPE
Mass x gravitational field strength (g) x height
Weight =
W = mass x gravitational field strength
Kinetic energy =
1/2 x mass x velocity or speed squared
EPE =
1/2 x force x extension
Power =
Energy transferred divided by time
Work done divided by time
Potential difference x current
Current squared x resistance
What units are these measured in
Power
Energy transferred
Time taken
Power = watts (W)
Energy transferred = joules (J)
Time taken = seconds (s)
Efficiency = (as a percent)
Useful power out divided by total power in x 100
Change in energy =
Mass of substance x specific heat capacity x change in temp
Energy =
Power x time
Current =
Voltage divided by resistance
Resistance =
Volt divided by current
Potential difference =
Current x resistance
Voltage =
Resistance x current
Power =
Energy divided time
Density =
Mass divided by volume
Specific heat capacity
Mass x specific heat capacity
