Chapter 6 Section 1 Work and Machines. Define work: __________________________________________ What...
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Transcript of Chapter 6 Section 1 Work and Machines. Define work: __________________________________________ What...
![Page 1: Chapter 6 Section 1 Work and Machines. Define work: __________________________________________ What 2 conditions apply to work? 1.________________________________________.](https://reader036.fdocuments.net/reader036/viewer/2022062408/56649ed35503460f94be3763/html5/thumbnails/1.jpg)
Chapter 6 Section 1 Work and Machines
![Page 2: Chapter 6 Section 1 Work and Machines. Define work: __________________________________________ What 2 conditions apply to work? 1.________________________________________.](https://reader036.fdocuments.net/reader036/viewer/2022062408/56649ed35503460f94be3763/html5/thumbnails/2.jpg)
Define work:______________________________________________________________________________________________________________________________What 2 conditions apply to work?1.__________________________________________________________________________________2. __________________________________________________________________________________
![Page 3: Chapter 6 Section 1 Work and Machines. Define work: __________________________________________ What 2 conditions apply to work? 1.________________________________________.](https://reader036.fdocuments.net/reader036/viewer/2022062408/56649ed35503460f94be3763/html5/thumbnails/3.jpg)
• Recall that energy is the ability to cause change.
• Another way to think of energy is that energy is the ability to do work.
• If something has energy, it can transfer energy to another object by doing work on that object.
![Page 4: Chapter 6 Section 1 Work and Machines. Define work: __________________________________________ What 2 conditions apply to work? 1.________________________________________.](https://reader036.fdocuments.net/reader036/viewer/2022062408/56649ed35503460f94be3763/html5/thumbnails/4.jpg)
What does the amount of work depend on?__________________________________________________________________________________________What is the formula for work?
![Page 5: Chapter 6 Section 1 Work and Machines. Define work: __________________________________________ What 2 conditions apply to work? 1.________________________________________.](https://reader036.fdocuments.net/reader036/viewer/2022062408/56649ed35503460f94be3763/html5/thumbnails/5.jpg)
Suppose you push a box of books up a 10m ramp. You apply a force of 10N and it takes you 20s to push the box. How much work is done pushing the box? Remember W=Fd
![Page 6: Chapter 6 Section 1 Work and Machines. Define work: __________________________________________ What 2 conditions apply to work? 1.________________________________________.](https://reader036.fdocuments.net/reader036/viewer/2022062408/56649ed35503460f94be3763/html5/thumbnails/6.jpg)
• Suppose you give a book a push and it slides along a table for a distance of 1 m before it comes to a stop. Did you do work the entire time?
________________________________________________________________________________________________________
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What is power?__________________________________________________________________________________What is the formula for power?
NOTICE – The SI unit for power is the Watt (J/s) **Because the watt is a small unit, power often is expressed in kilowatts - One kilowatt (kW) equals 1,000 W
![Page 8: Chapter 6 Section 1 Work and Machines. Define work: __________________________________________ What 2 conditions apply to work? 1.________________________________________.](https://reader036.fdocuments.net/reader036/viewer/2022062408/56649ed35503460f94be3763/html5/thumbnails/8.jpg)
Suppose you push a box of books up a 10m ramp. You apply a force of 10N and it takes you 20s to push the box. How much work is done pushing the box? In the work problem you found that W= 100 JNow use the Power formula to calculate how much power you used. Remember P=W/t
![Page 9: Chapter 6 Section 1 Work and Machines. Define work: __________________________________________ What 2 conditions apply to work? 1.________________________________________.](https://reader036.fdocuments.net/reader036/viewer/2022062408/56649ed35503460f94be3763/html5/thumbnails/9.jpg)
Power and Energy – making connections• Power is also the rate at which
energy is transferred.
• The power involved can be calculated:
NOTICE – Power is Joules/seconds with both work and energy
![Page 10: Chapter 6 Section 1 Work and Machines. Define work: __________________________________________ What 2 conditions apply to work? 1.________________________________________.](https://reader036.fdocuments.net/reader036/viewer/2022062408/56649ed35503460f94be3763/html5/thumbnails/10.jpg)
Suppose a light bulb changes electrical energy into light and heat at a rate of 100J in 2s. How many watts of power does the light bulb have?Use P=E/t
![Page 11: Chapter 6 Section 1 Work and Machines. Define work: __________________________________________ What 2 conditions apply to work? 1.________________________________________.](https://reader036.fdocuments.net/reader036/viewer/2022062408/56649ed35503460f94be3763/html5/thumbnails/11.jpg)
Section CheckSection Check
__________ is the transfer of energy that occurs when a force makes an object move.
A. ConversionB. EnergizationC. PowerD. Work
11Question 1
![Page 12: Chapter 6 Section 1 Work and Machines. Define work: __________________________________________ What 2 conditions apply to work? 1.________________________________________.](https://reader036.fdocuments.net/reader036/viewer/2022062408/56649ed35503460f94be3763/html5/thumbnails/12.jpg)
Section CheckSection Check
The amount of work done depends on what two things?
11Question 2
![Page 13: Chapter 6 Section 1 Work and Machines. Define work: __________________________________________ What 2 conditions apply to work? 1.________________________________________.](https://reader036.fdocuments.net/reader036/viewer/2022062408/56649ed35503460f94be3763/html5/thumbnails/13.jpg)
Section CheckSection Check
Which of the following equations can be used to calculate power?
A. W = F/dB. P =WtC. t = W/PD. P = t/W
11Question 3