mechanical energy monuments review
DESCRIPTION
Mechanical Energy Monuments Review. So you can commit it to M.E.M.Re. Lets start with work. What is work? The transfer of energy by mechanical means; is done when a constant force is exerted on an object in the direction of motion. Work 2. What does that mean? - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/1.jpg)
Mechanical Energy
Monuments Review
So you can commit it to M.E.M.Re
![Page 2: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/2.jpg)
Lets start with work What is work?
The transfer of energy by mechanical means; is done when a constant force is exerted on an object in the direction of motion.
![Page 3: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/3.jpg)
Work 2 What does that mean?
My version: Work is the energy we use/get on/from an object moving because a force (push pull) was applied.
I move an object I am doing work.
![Page 4: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/4.jpg)
Picture time Draw a picture:
![Page 5: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/5.jpg)
Work 3 What is the equation for work?
W = Fd (cos Θ)
What does that cos mean?
We can have positive, negative, and 0 work.
![Page 6: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/6.jpg)
Work 4 Positive: When the force and the direction
are pointed in the same direction
Negative: When the force and the direction are pointed in opposite directions
Zero: When the force and the direction are perpendicular.
![Page 7: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/7.jpg)
Work video http://youtu.be/_N0r1ignq1w
![Page 8: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/8.jpg)
Kinetic energy What is Kinetic energy?
Kinetic means ‘to move’ so it is energy from motion.
![Page 9: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/9.jpg)
Picture time Draw a picture:
![Page 10: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/10.jpg)
Equation What is the equation for KE?
KE= ½ mv2
Don’t forget the squared velocity!
![Page 11: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/11.jpg)
KE video http://youtu.be/2MkAZu6QW0I
![Page 12: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/12.jpg)
Potential energy What is potential energy?
It is energy stored, in this class we are dealing with potential energy gravitation. So the stored energy is based on how high up is the object.
![Page 13: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/13.jpg)
Picture time Draw a picture:
![Page 14: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/14.jpg)
Equation What is the equation for PE?
PE = mgh
![Page 15: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/15.jpg)
PE video http://youtu.be/pNl8flwGWD8
![Page 16: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/16.jpg)
Mechanical energy What is Mechanical energy?
Energy of an object due to its motion or position.
![Page 17: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/17.jpg)
ME 2 What does that mean?
Mechanical energy is if a physical object is moving or can move.
![Page 18: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/18.jpg)
Picture time Draw a picture:
![Page 19: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/19.jpg)
Equation What is the equation for Mechanical energy.
MEi=MEf
What I start with is what I will end with.
![Page 20: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/20.jpg)
Concept question A man rides an elevator to the 3rd floor of
his building. (12 m high), his identical twin takes the stairs. If the stairs go around the entire building who has more Energy when they reach the room?
![Page 21: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/21.jpg)
Boxy (5kg of mass) falls from 2m up, how fast is boxy
moving just before he hits the ground?
![Page 22: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/22.jpg)
You try. A roller coaster cart (100kg) is traveling at
40m/s at the bottom of the track. How high will the cart climb up the track?
![Page 23: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/23.jpg)
Pendulum A mass of 3kg is held 0.5m above the
ground. If released from rest how much Kinetic energy will the mass have at the bottom of the swing?
![Page 24: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/24.jpg)
Pendulum 2 How much KE will it have at 0.25m above
the ground?
![Page 25: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/25.jpg)
Hill A man on top of a hill 7m tall slides down to
the bottom. If the man has a mass of 90kg and we ignore friction how fast is the man traveling ½ way down the hill?
![Page 26: Mechanical Energy Monuments Review](https://reader035.vdocuments.us/reader035/viewer/2022062323/5681634a550346895dd3da80/html5/thumbnails/26.jpg)
Hill 2 What is the KE of the man at the bottom of
the hill.