Work, Power, and Force
This week in Physics, we learned about work, power, and force.
Work is equal to any change in energy. It can be found by the equation W = f (force) • d (distance), and is measured in Joules (J).
Work is related to power because power is the rate at which work is being done. Power = work / time and is measured in Watts (W).
We also learned about energy. In an isolated system, energy can not be created nor destroyed, it just changes form. There are two forms of energy; potential (energy of position) PEg = mass • height • gravity, and kinetic (energy of motion) KE = 1/2 mass • velocity^2.
Below we have a dog. This dog does work while playing fetch because it exerts a certain force for a certain distance on the stick being used.
PC: Noʻe
Sunday, December 8, 2013
Monday, December 2, 2013
I'm Thankful For....
I'm thankful for Physics because it helps me understand why things work in the way they do. I am thankful for Blake and Freitas because they make learning fun and enjoyable. They make me look forward to coming to another crazy class. In physics, I'm thankful for gravity (an unbalanced outside force that acts on objects at -9.8m/s^2 in the y-axis). It allows us to live our lives on earth the way we do. It also prevents us from floating off into space. I'm also thankful for acceleration, momentum, and mass because it allows us to perform daily tasks that are necessary for us to live. I am thankful for Newton because he explained why things happen the way they do in his 3 laws. Physics shapes life on earth as we know it.
I'm thankful for Physics because it helps me understand why things work in the way they do. I am thankful for Blake and Freitas because they make learning fun and enjoyable. They make me look forward to coming to another crazy class. In physics, I'm thankful for gravity (an unbalanced outside force that acts on objects at -9.8m/s^2 in the y-axis). It allows us to live our lives on earth the way we do. It also prevents us from floating off into space. I'm also thankful for acceleration, momentum, and mass because it allows us to perform daily tasks that are necessary for us to live. I am thankful for Newton because he explained why things happen the way they do in his 3 laws. Physics shapes life on earth as we know it.
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