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# Work,Power,Waves

### This explains all about work power and waves.

What is a wave? A wave can be described as a disturbance that travels through a medium from one location to another location.
What is a medium? A medium is the center of a wave.
What is a transverse wave? A wave in which the particles of the wave's medium move at right angles to the direction of wave movement.
What is a crest? A crest is the high point of a wave.
What is a trough? A trough is the low point of a wave.
What does a longitudinal wave do? A longitudinal wave is a wave that vibrates the same way it travels.
What is compression? Compression is a shock wave that compresses the medium through which it is transmitted.
What is rarefaction? The traveling or motion of a longitudinal wave.
What is a mechanical wave? A mechanical wave is a disturbance that pulsates through some form of medium: a solid, a liquid, or a gas, carrying the original, initiating energy from one place to another.
What is an electromagnetic wave? a wave produced by the acceleration of an electric charge by the periodic variation of intensities of, usually, perpendicular electric and magnetic fields.
What is amplitude? Amplitude is the measurement of how much energy is being carried out from a wave.
What is wave length? Wave length is the distance between crests.
What is frequency? How much a wave is repeated and weather is is close and fast or far and big.
What is a hertz? A hertz is a unit of frequency equal to one cycle per second
What is wave speed? Wave speed is a measure of how fast a wave travels. It is calculated as a ratio of how far a wave travels to the time it takes the wave to travel that distance.
What is force? A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects. The unit of measurement is 'F'.
What is work? "work" is when a force applied to an object moves the object in the same direction as the force. The calculation for work is W times D w (work) d (distance)
What is power? Power is the rate at which work is done or energy is transferred in a unit of time.
Calculate Work- A 100n force is applied to move a 15kg object a horizontal distance of 5 meters at constant speed Answer- W=F times D = 100n (5m) = 500j/joules
Calculate Force- An object of mass 300 kg is observed to accelerate at the rate of 4 m/s2. Calculate the force required to produce this acceleration. F = m a F = (300 kg) (4 m / s2) F = 1200 kg m /s2 = 1200 N
Knowing what you know, in order to complete Work what must there be / what must happen? In order to accomplish work on an object there must be a force exerted on the object and it must move in the direction of the force.
Knowing that work uses energy what would that energy be called? That energy would be called power.
How are force and power different? Force is the fundamental result of an interaction between two objects, while power is an expression of energy consumed over time (work)
Knowing that there is low frequency waves and high frequency waves, which produces smaller waves? High frequency waves produce much smaller waves because it is traveling faster.
Knowing that energy comes out of a wave what is the word used to measure how much energy is being exerted out of the wave? The word for measuring how much energy comes out of a wave is called "Amplitude".
Does changing the frequency of a wave affect its speed? Why or why not? No, because as we increase the frequency, the wavelength decreases (and vice versa).
Now you should be ready for a test ;)
Created by: JohnnyBoii