Integrated Natural Science Integrated Natural Science as long as

Integrated Natural Science Integrated Natural Science as long as www.phwiki.com

Integrated Natural Science Integrated Natural Science as long as

Ibsen, David, Founder/Blogger has reference to this Academic Journal, PHwiki organized this Journal Integrated Natural Science Integrated Natural Science as long as Detroit Public Schools Ropes in addition to Pulleys Kat Woodring Key Questions: 4.1.1 Explain the function of simple machines. 4.1.2 Differentiate input in addition to output as long as ces in addition to diagrams all as long as ces. 4.1.3 Calculate the mechanical advantage of a simple machine. 4.1.4 Relate the concepts of simple machines to the human body. 4.1.5 Calculate advantage mechanical using input in addition to output.

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Michigan Content Expectations P3.2B Compare work done in different situations. P3.2C Calculate the net as long as ce acting on an object. Qualitatively in addition to quantitatively explain as long as ces in addition to charges in motion. District Outcomes Simple Machines Include: rope in addition to pulley wheel in addition to axle systems gears ramps levers screws Pulleys as Simple Machines Simple machines can change the direction in addition to /or magnitude of an input as long as ce

Pulley Investigation 1 Add 3 weights the bottom block The bottom block in addition to the weights are the load to be lifted. Use the as long as ce scale to measure the total weight of the load. Record it. Pulley Investigation 1 Why does the pulley have so many strings The yellow string is the one we pull to lift the lower block, it then supports the block in addition to transfers the lifting as long as ce to the block. Red safety strings support bottom pulley block only when hanging How Can We Lift the Block 1. We can attach the yellow string to the BOTTOM block in addition to then thread it up in addition to over the top set of pulleys in addition to pull OR . 2. We can attach the yellow string to the TOP block, thread it down through the bottom pulley set in addition to then up in addition to over the top set of pulleys in addition to pull.

Measure the Input Force Attach the Spring Scale to the pulling end of the yellow string. Pull on the string in addition to lift the load – read the value from the scale as this happens. Lower the load with the string – again read the scale as this happens. Average the two values from the scale – this is the value of your Input Force. Measure the Input Force as long as Two Supporting Str in addition to s Unclip the yellow string from the bottom block. Thread the string through the lower set of pulleys. Attach the yellow string to the top block. Repeat the input as long as ce measurement process as long as TWO supporting strings. Looping the String Around the Pulleys Supporting strings : 1, 3, 5 Supporting strings : 2, 4, 6

Forces Involved The weight of the load does not change, it is the same as long as each trial. The output as long as ce will be the as long as ce required to hold the load still– it does not change since the weight remains the same As more strings are added, the input as long as ce required to achieve the same output as long as ce decreases. Mechanical Advantage Ratio of Output Force to Input Force Follows simple pattern with Ropes in addition to Pulley system What is the Mathematical Rule We found that the input as long as ce required to lift the load decreased as the of supporting strings increased. What is the relationship of strings x Input Force = Weight of load of strings = Mechanical Advantage

Key Questions: 4.1.1 Explain the function of simple machines. 4.1.2 Differentiate input in addition to output as long as ces in addition to diagrams all as long as ces. 4.1.3 Calculate the mechanical advantage of a simple machine. 4.1.4 Relate the concepts of simple machines to the human body. 4.1.5 Calculate advantage mechanical using input in addition to output. Mechanical Advantage For the Lever Two ways to calculate mechanical advantage: Output Force/Input Force Input arm length/Output arm length We can use this to generate large as long as ces from much smaller as long as ces. Work We define in addition to measure work in a very specific way in science. Work = Force x Distance One joule of work is accomplished when 1 newton of as long as ce is used to move an object a distance of 1 meter

Pulley Investigation – 2 Work Transfer the data you recorded as your Output Force from investigation 4.1 to the Data Table in 4.2. Pulley Investigation – Work What distances are we measuring Input :The length of the yellow string that is pulled to lift the block ( L ). Output: The height of the block after it is lifted; the distance it is lifted ( h ). Measure the Input Force Attach the spring scale to the pulling end of the yellow string. Pull on the string in addition to lift the load – read the value from the scale as this happens. Lower the load with the string – again read the scale as this happens Average the two values from the scale – this is the value of your input as long as ce.

Forces Involved The weight of the load does not change, it is the same as long as each trial. The output as long as ce will be the as long as ce required to hold the load still– it does not change since the weight remains the same As more strings are added, the input as long as ce required to achieve the same output as long as ce decreases. Data Collection We will be taking the data at all 6 of the pulley arrangements. Compare the data at each arrangement: What changes in addition to how What stays the same Do the calculations as long as the last two columns ( Work Output & Work Input ) after all the data has been collected . Work Calculation The joule is the unit used to measure work in this Investigation. Work Input = string length x input as long as ce Work Output = height change x output as long as ce

Ibsen, David five blogs before lunch Founder/Blogger www.phwiki.com

Work Relationship As the of pulleys used increased, the input as long as ce required decreased. As the of pulleys used increased, the input length of string increased. Work Output was very close (but not equal to) Work Input. Work : You Don’t Get Something For Nothing Work = Force x Distance As the Input Force goes down, the Length of string increases. It’s a trade off – Force vs. Distance You can use less as long as ce to lift the same weight as the Mechanical Advantage increases, but you have to pull more string to do it. Input vs. Output The change in as long as ce in addition to distance as long as pulleys is easy to feel while doing the investigation. In fact, Work Output is always less than Work Input. Where does it go Friction

Power – the rate at which work is done Rates are often measured in terms of time Speed = Distance / Time Work = Power x Time Power = Work / Time The Work – Energy Theorem The total amount of work that can be done is equal to the total amount of energy available. Objects cannot do work without energy. Energy is the ability to do work. Energy is also measured in joules – it is stored work. Energy can be stored as long as later use. The Work – Energy Theorem Energy can be converted or trans as long as med from one as long as m to another. Anything with energy can produce a as long as ce that is capable of action over a distance.

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