Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
18 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
Define Energy |
The ability to do work. Measured in Joules (J) |
Origin of the Word (Greek) in = en work = ergon in-work = energon = Energy |
|
|
Define Work |
Work is done on an object only when force moves that object through a distance. |
Think of the formula... Also, the Greek word for movement is Kinema |
|
|
Define Force |
Force is a push or a pull measured in Newtons. When force moves something through a distance, work is done. |
|
|
|
What is the relationship between work and energy? |
They are the same. Both measures in Joules. |
|
|
|
What happens when force moves an object? |
When force is applied to an object, the amount of work done on the object depends on... The amount of force applied, The distance the object moves. |
|
|
|
Define Power |
Power is the rate at which energy is absorbed or transferred. |
|
|
|
Formula for Work (w)? |
Work = Force • Distance w = F • d |
|
|
|
Formula for Force (F)? |
Force = work/distance F = w/d |
|
|
|
Formula for Distance (d)? |
Distance = work/Force d = w/F |
|
|
|
What is Work, Force, and Distance primarily measured in? |
Work = Joules (J) Force = Grams (g (conversion may be necessary)) Distance = Meters (m (conversion may be necessary)) |
|
|
|
Formula for Power? |
Power = work/time P = w/t |
|
|
|
What is Power and Time primarily measured in? |
Power = Joules per second / Watt (j/s(ec) or w) Time = Seconds (sec/s) |
|
|
|
The other formula for Work (w)? |
Work = Power • Time w = P • t |
|
|
|
Formula for Time (t)? |
Time = Work/Power t = w/P |
|
|
|
Formula for Physical Energy (PE)? |
Physical Energy = Mass x Gravity x Height PE = mgh |
|
|
|
Formula for Kinetic Energy (KE)? |
Kinetic Energy = ½ mass x speed² KE = ½mv² |
|
|
|
What is Gravity, Height, Mass, and Speed primarily measured in? |
Gravity = 9.8m/s² (never changes) Height = meters (m) Mass = Kilograms (kg) Speed = Miles/Secosnd (m/s) |
|
|
|
What is Physical and Kinetic Energy Primarily measured by? |
PE/KE = kgm²/s² or Joules (J) Divide the Joules by 1000 to make it into KiloJoules (KJ) |
|
