DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick...
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Transcript of DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick...
![Page 1: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/1.jpg)
DW 12/4
1. Work is when an object moves in the _________ direction as the force applied.
2. If I pick up a book up 0.3 m with 6 N of force, how much work have a done on that book? W = FD
3. If a horse pulls a load using 4000j in 20 s, how much power did the horse use? P = W/T
4. Power is simply how fast or slow ____ occurs.5. Why is carrying an object NOT work? Look at the
definition to assist you.
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How do we distinguish between
the six simple machines?
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Create flipbook out of 3 pieces of paper
Label flaps:
Inclined Plane Lever
Wedge Wheel and Axle
Screw Pulley
![Page 4: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/4.jpg)
Simple Machines
• Increase force
• Increase distance over which a force acts
• Change direction of force
![Page 5: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/5.jpg)
Inclined Plane
• Also called a ramp• Flat, sloped surface• Less force is needed to move an object from
one height to another using an inclined plane versus lifting the object
• Does NOT reduce the amount of work done it just changes
• Real world examples: stairs, switchbacks on a trail or road, wheelchair ramp
![Page 6: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/6.jpg)
Wedge
• Incline plane that can be moved
• Often push materials apart
• One or two sloping sides
• Does NOT change the amount of work done
• Ex. Knife, axe, doorstops, teeth
![Page 7: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/7.jpg)
Screw
• Incline plane wrapped around a cylinder
• Does NOT change the amount of work done.
![Page 8: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/8.jpg)
Explain to your neighbor what all these machines have in
common.
![Page 9: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/9.jpg)
Brainpop
Inclined Plane
![Page 10: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/10.jpg)
Lever
• Any rigid rod or plank that pivots or rotates around a point called a fulcrum
• 3 classes according to location of fulcrum with respect to the input and output force
• PAGE 441 fulcrum Input force output force
• Ex. Baseball bat, scissors, seesaw, wheel barrow
1st class (see-saw)
3rd class (Baseball bat)
2nd class (wheel barrow)
![Page 11: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/11.jpg)
Brainpop
Levers
![Page 12: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/12.jpg)
Wheel and Axle
• 2 circular objects of different diameters attached so they rotate together
• Wheel has the larger diameter and the axle has the smaller diameter
• Examples: doorknob, water wheel, water spicket, Ferris wheel, steering wheel, ceiling fan
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Brainpop
Wheel and axle
![Page 14: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/14.jpg)
Pulley p443• Consists of a grooved wheel with a rope or cable
wrapped over it• Changes direction of the force; when you pull down the
object goes up
• Examples: raising a sail, raising a window blind, raising a flag
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Brainpop
Pulleys
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House hold object Machine or Machines in the object
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
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Homework
• Science: WB 136
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What tool would you use to separate a peel from a pear?
![Page 19: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/19.jpg)
Which type of simple machine is used to harness geothermal
energy, wind energy, and hydroelectricity?
![Page 20: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/20.jpg)
When I push on a box, what force is working against me?
![Page 21: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/21.jpg)
What type of simple machine
is a slide?
![Page 22: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/22.jpg)
If work = force times distance, how much work is done when
you push a box with a force of 6 N two meters?
![Page 23: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/23.jpg)
If the box I was just pushing continues on sliding after I
release, is it work? EXPLAIN
![Page 24: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/24.jpg)
What are the three simple machines that involve slanted
surfaces?
![Page 25: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/25.jpg)
Why are inclined planes used by movers and for disabled people
getting into a vehicle?
![Page 26: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/26.jpg)
Mechanical advantage
MA = OF/IF
• The number of times the machine increases the input force
![Page 27: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/27.jpg)
Inclined Plane
• The longer the inclined plane, the less force required to move an object.
![Page 28: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/28.jpg)
Wedge
• Mechanical advantage increases as it becomes longer and thinner
![Page 29: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/29.jpg)
Screw
• The tighter the threads the greater the “mechanical advantage”.
![Page 30: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/30.jpg)
Lever
• Mechanical advantage depends on the location of the input force, output force, and fulcrum.
![Page 31: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/31.jpg)
Wheel and Axle
• “Mechanical advantage” is equal to the diameter of the wheel divided by the diameter of the axle
![Page 32: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/32.jpg)
Pulley• Fixed pulley does not change the force you exert or the
distance over which you exert it. Mechanical advantage is 1.
• Moveable pulley is when the pulley is attached to the object you are moving. Mechanical advantage is 2.
• Pulley system is made of multiple pulleys (fixed or moveable) and the mechanical advantage is found by adding.
![Page 33: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/33.jpg)
How do I increase the mechanical advantage of an inclined plane and screw?
![Page 34: DW 12/4 1.Work is when an object moves in the _________ direction as the force applied. 2.If I pick up a book up 0.3 m with 6 N of force, how much work.](https://reader034.fdocuments.us/reader034/viewer/2022051621/56649e9e5503460f94ba096f/html5/thumbnails/34.jpg)
SS Test Study Material• Urban, Suburban, and Rural characteristics• Reading graphs and charts• Reading a topographic map• Physical maps have physical features, thematic
maps are based on a theme, political maps show political boundaries and cities
• Urbanization causes and effects• Population pyramids• Vocabulary words