Energy Examples Elastic Examples Chemical Examples Electric In
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![Examples �Elastic Examples �Elastic](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-2.jpg)
![Examples �Chemical Examples �Chemical](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-3.jpg)
![Examples �Electric Examples �Electric](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-4.jpg)
![�In this class we will focus on gravitational potential energy and elastic potential energy. �In this class we will focus on gravitational potential energy and elastic potential energy.](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-5.jpg)
![�Imagine a boulder on a cliff above Wile E. Coyote �The boulder has potential �Imagine a boulder on a cliff above Wile E. Coyote �The boulder has potential](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-6.jpg)
![PEg = mgh Where: �PEg = Gravitational potential energy (J) �m = mass (kg) PEg = mgh Where: �PEg = Gravitational potential energy (J) �m = mass (kg)](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-7.jpg)
![Ex. A 15. 0 kg textbook is sitting on a 1. 20 m tall Ex. A 15. 0 kg textbook is sitting on a 1. 20 m tall](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-8.jpg)
![�Elastic Potential Energy is energy that is stored in a compressed or a stretched �Elastic Potential Energy is energy that is stored in a compressed or a stretched](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-9.jpg)
![Ex. An archer pulls on a bow string with an average force of 240 Ex. An archer pulls on a bow string with an average force of 240](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-10.jpg)
![Elastic Potential Energy examples: Textbook p. 166 Q 1 -3 Gravitational Potential Energy examples: Elastic Potential Energy examples: Textbook p. 166 Q 1 -3 Gravitational Potential Energy examples:](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-11.jpg)
![Scalar value Measured in Joules (J) KE = Where: �m = mass �v Scalar value Measured in Joules (J) KE = Where: �m = mass �v](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-12.jpg)
![EXAMPLE A 60. 0 kg student is running at a uniform speed of 5. EXAMPLE A 60. 0 kg student is running at a uniform speed of 5.](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-13.jpg)
![EXAMPLE The kinetic energy of a 2. 1 kg rotten tomato is 1. 00 EXAMPLE The kinetic energy of a 2. 1 kg rotten tomato is 1. 00](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-14.jpg)
![THE WORK ENERGY THEOREM If a net force acts on an object then it THE WORK ENERGY THEOREM If a net force acts on an object then it](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-15.jpg)
![EXAMPLE A sprinter exerts a net force of 260 N over a distance of EXAMPLE A sprinter exerts a net force of 260 N over a distance of](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-16.jpg)
![EXAMPLE A student pushes a 25 kg crate which is initially at rest with EXAMPLE A student pushes a 25 kg crate which is initially at rest with](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-17.jpg)
- Slides: 17
![Energy Energy](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-1.jpg)
Energy
![Examples Elastic Examples �Elastic](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-2.jpg)
Examples �Elastic
![Examples Chemical Examples �Chemical](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-3.jpg)
Examples �Chemical
![Examples Electric Examples �Electric](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-4.jpg)
Examples �Electric
![In this class we will focus on gravitational potential energy and elastic potential energy �In this class we will focus on gravitational potential energy and elastic potential energy.](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-5.jpg)
�In this class we will focus on gravitational potential energy and elastic potential energy. �Gravitational Potential Energy is stored energy due to its position above the Earth. �Remember: Energy transferred from one
![Imagine a boulder on a cliff above Wile E Coyote The boulder has potential �Imagine a boulder on a cliff above Wile E. Coyote �The boulder has potential](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-6.jpg)
�Imagine a boulder on a cliff above Wile E. Coyote �The boulder has potential energy due to its position. �It has the potential to fall and do work on him.
![PEg mgh Where PEg Gravitational potential energy J m mass kg PEg = mgh Where: �PEg = Gravitational potential energy (J) �m = mass (kg)](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-7.jpg)
PEg = mgh Where: �PEg = Gravitational potential energy (J) �m = mass (kg) �g = acceleration due to gravity (m/s 2) �h = height (m)
![Ex A 15 0 kg textbook is sitting on a 1 20 m tall Ex. A 15. 0 kg textbook is sitting on a 1. 20 m tall](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-8.jpg)
Ex. A 15. 0 kg textbook is sitting on a 1. 20 m tall table. If the book is lifted 0. 80 m above the table, how much gravitational potential energy does it have a. with respect to the table? b. with respect to the floor?
![Elastic Potential Energy is energy that is stored in a compressed or a stretched �Elastic Potential Energy is energy that is stored in a compressed or a stretched](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-9.jpg)
�Elastic Potential Energy is energy that is stored in a compressed or a stretched object. �A compressed or a stretched object has the potential to do work when it returns kto its original = spring constant, or a measure of how stiff a shape. spring is. (N/m) �PE =½kx x = distance that the spring has been 2 stretched or compressed
![Ex An archer pulls on a bow string with an average force of 240 Ex. An archer pulls on a bow string with an average force of 240](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-10.jpg)
Ex. An archer pulls on a bow string with an average force of 240 N while drawing the arrow back a distance of 0. 200 m. Calculate the potential energy of the bow-arrow system. HINT: The work done to the bow is all being stored as potential energy.
![Elastic Potential Energy examples Textbook p 166 Q 1 3 Gravitational Potential Energy examples Elastic Potential Energy examples: Textbook p. 166 Q 1 -3 Gravitational Potential Energy examples:](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-11.jpg)
Elastic Potential Energy examples: Textbook p. 166 Q 1 -3 Gravitational Potential Energy examples: Potential energy worksheet
![Scalar value Measured in Joules J KE Where m mass v Scalar value Measured in Joules (J) KE = Where: �m = mass �v](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-12.jpg)
Scalar value Measured in Joules (J) KE = Where: �m = mass �v = speed 2 ½mv
![EXAMPLE A 60 0 kg student is running at a uniform speed of 5 EXAMPLE A 60. 0 kg student is running at a uniform speed of 5.](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-13.jpg)
EXAMPLE A 60. 0 kg student is running at a uniform speed of 5. 70 m/s. What is the kinetic energy of the student?
![EXAMPLE The kinetic energy of a 2 1 kg rotten tomato is 1 00 EXAMPLE The kinetic energy of a 2. 1 kg rotten tomato is 1. 00](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-14.jpg)
EXAMPLE The kinetic energy of a 2. 1 kg rotten tomato is 1. 00 x 103 J. How fast is it moving?
![THE WORK ENERGY THEOREM If a net force acts on an object then it THE WORK ENERGY THEOREM If a net force acts on an object then it](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-15.jpg)
THE WORK ENERGY THEOREM If a net force acts on an object then it must be accelerating. This acceleration is proportional to its change in kinetic energy. Therefore: W = Fnetd = ∆Ek
![EXAMPLE A sprinter exerts a net force of 260 N over a distance of EXAMPLE A sprinter exerts a net force of 260 N over a distance of](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-16.jpg)
EXAMPLE A sprinter exerts a net force of 260 N over a distance of 35 m. What is his change in kinetic energy?
![EXAMPLE A student pushes a 25 kg crate which is initially at rest with EXAMPLE A student pushes a 25 kg crate which is initially at rest with](https://slidetodoc.com/presentation_image_h/27a24222c86818475b5cd51c2ad3028d/image-17.jpg)
EXAMPLE A student pushes a 25 kg crate which is initially at rest with a force of 160 N over a distance of 15 m. If there is 75 N of friction, what is the final speed of the crate?
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