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Unit 9: Energy
1) I can define energy.
* Energy- is the power to change things, the amount of work that can be done by a force
2) I can define potential energy.
* Potential energy- is the energy an object has based on a position (height or stretched/compressed)
3) I can describe different forms of potential energy.
* 2 Different Types-
- Gravitational Potential energy- the force associated with this energy is the work required to lift the object to its position.
- Elastic Potential Energy- the force associated with this energy is the work done by the object stretching/compressing the spring
4) I can calculate gravitational potential energy. (mass x gravity x height)
* GPE=m*g*h
5) I can define kinetic energy.
* Kinetic energy- is a push on an object and you can set it in motion. If an object is moving, then it is capable of doing work.
6) I calculate kinetic energy.
* KE=1/2*m*v(squared)
7) I can describe how energy is transformed from one form to another.
* Energy cannot be created nor destroyed only transformed from one energy to another.
8) I can apply the Law of Conservation of Energy.
* Energy cannot be created nor destroyed only transformed from one energy to another.
9) I can explain the meaning of "work."
* Work- is the product of the displacement and the force component parallel to the direction of travel.
10) I can describe how work and energy are related.
* Energy is defined as the ability for an object to do work.
**Example: when you lift a box from the ground to a shelf, you are
doing work on that object. You are giving the box the ability to
change, to move.
* If the net work done on an object is positive, then the object's
energy increases
* If the net work done on an object is negative, then the object's
energy decreases
* If the net work on the object is zero, then the object's energy
remains constant
11) I can calculate work.
* W=Fd (Work=force x distance)
12) I can define power.
* Power is the rate at which work is done.
13) I can calculate power.
* P=Fd/t (Power=force x distance/time)
* P=W/t (Power=work/time)
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