SCI 104 Lecture Notes - Lecture 3: Mechanical Energy, Pile Driver, Rubber Band
2 Nov 2017
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Big ideas for you to understand today: energy and work, power, work-energy theorem, conservation of energy. The red ball of mass m and the blue ball of mass 2m have the same kinetic energy. The faster- moving ball is the: red ball, blue ball, both the same, more information is needed. Work: work, defined as the product of force exerted on an object and the distance the object moves (in the same direction as the force) Energy: defined as that which produces changes in matter. It is being transferred from one place to another. It is being transformed from one form to another: both work and energy are measured in joules. Power: power, measure of how fast work is done, equation: Power = work done/ time interval: units in joule per second or watt (one watt = 1 joule of work per second) Is defined as stored energy due to position, shape, or state.
