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# Energy

### waves, work, and power

What's the force unit of measurement A push or pull extended from an object in order to change the order of the object, measured in newtons
Work The force used to measure the distance by joules
Wave Vibrations inside a medium
Crest The point where the wave is highest
Trough The point where the wave is lowest
Congitudinal Waves When the waves move back in fourth in a coil
Cmpression When the coil is compacted
Rarefration When the spring coils spread apart
Transverse Waves Spring coil waves move up and down
Mechanical waves Waves that need a medium
Electromagnetic Waves Waves that travel through empty space
Amplitude The measure of how far particles move from their rest position in a medium
Wavelength The distance from any point on a wave to the next identical position
Frequency The number of waves that parts a point in a amount of time
Hertz The measure of frequency H= Wavelength per second
Wave speed The speed a wave travels S= D/T
Medium A material waves can travel through
Power The rate in which work is done P= W/T
Work Force x Distance
Power Work/Time
Wavelength Wave speed/ frequency
If 360 joules of work are needed to move a crate a distance of 4 meters, what is the weight of the crates F=W/D F= 360/4 F= 90 newtons
If a group of workers can apply a force of 1000 newtons to move a crate 20 meters, what amount of work is accomplished W=FxD W=1000x20 20000 joules
if 68 joules of work is necessary to move a 4 newton crate, how far was the crate moved 17 meters D=F/W D= 68/4
How much work is done holding a 15N sack of potatoes while waiting in line at the grocery store for 3 min D=0.5 W=FxD W=15x.5 7.5 joules
3 examples of mechanical waves Water waves, sound waves, and music
Created by: 311150