Work is equal to F x d. Work is measured in Joules, and in order for work to occur, Force and Distance must me parallel. Work is not done if the two are not parallel.
Also in the realm of Work is Power, which is equal to work/time. As Ms. Lawrence said in her video, Power measures how quickly work is done. Power is measured in Joules/time, or Watts.
Kinetic Energy is the energy to do work. Kinetic Energy=1/2mv^2, and is equal to Work (Work=Change in KE).
This video is helpful, if not slightly strange.
An importance piece of understanding is how it relates to airbags. Airbags help to keep us safe, because we go from moving to not moving, no matter how we were stopped. Therefore, the Change in KE (Change in KE= Ke final- KE initial) is the same with or without the airbag. The change in KE is equal to Work, meaning that work is consistent as well. Work= F x d.
The airbag increases the distance between you and where the force is applied, lessening the force. Small force=less energy.
without airbag: work = F x d
with airbag: work = f x d
Potential Energy is the energy of position, and is equal to (m)(g)(h). An import thing to note is that movement is NOT NECESSARY to have energy. In order for there to be potential energy, there must be height.
Max KE= Max PE is another important part. It states that there is always going to be the same about of energy at the beginning as there is at the end. This is why Roller coasters work.
The Law of Conservation of Energy is the law that states work in = work out.
Machines decrease the amount of force needed for work to occur. This is done by a number of simple machines, including ramps and pulleys.
Machines, however, are not completely efficient. Some of the energy is exerted in t
This is a very helpful video, and has a catchy (yet repetitive) tune.
Hi Annie! I really enjoyed your blog! It was detailed and included many intricate images to aid the reader. Great job and keep up the good work!
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