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Unformatted text preview: Kevin Lee Period 5 Chapter 7, 8 Scrapbook Chapter 7 In the first picture, my sister is pulling the cart at a certain velocity. The main topic of chapter 7 is work and kinetic energy. We can use this measure of velocity to calculate the kinetic energy, the energy of motion, by multiplying one-half, the mass of the cart, and square of the velocity. The faster my sister pulls on the cart, the greater its kinetic energy will be. The work done on the cart by my sister's force has a positive value when energy is transferred to the cart from my sister and will be negative when the energy is transferred from the cart. The work can be found by multiplying the force of my sister's pull and the distance it travels, when the direction of the force and displacement is the same. We see a relationship between work and kinetic energy made into a theorem called 'work-kinetic energy theorem.' This theorem says that the change in kinetic energy as my sister brings the cart to a stop is the same as the total work...
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- Spring '06