Representing Energy Transfers with Bar (LOL) Charts
Energy Problem Solving
Answers: C, B, E, options 1,2,3,5,7,8
Power
Power is simply the work done on an object over the amount of time it takes to complete that work (P = W / t). The SI units for power are the Watt (W), but power can also be notated using the units for work over time (J / s). In the equation, work can be substituted with F * d (Force * distance), as this will yield an equivalent result for power, in Watts. The reason for this is because Work = Force * distance. This only works if an object is not having a force applied to it up an incline, as cos(theta) has to equal 1 in this equation.
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Relating Energy/Work/Power to Forces and Motion
One way to think about Energy/Work/Power (the main concepts of this unit), are to think of them as expansions of force and motion. In previous units, values for acceleration, initial velocity, final velocity, distance, displacement, time, and others were found. In this unit, finding those units can help solve problems regarding energy, work, and power.
Connecting Representations of Motion with Representations of Forces
When previously representations of different motions were used to determine quantities like forces, now representations of different forces are being used to determine quantities like energy, work and power. A representation of a force helps one determine the work done with that force, or the power of the object the force is being applied upon. While these can be perceived as more complicated, the methods for interpreting representations of motion and representations of forces are similar.The only change in method |
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