Studentteacher actions what students and teachers should be doing to facilitate learning studentswillinvestigateandcalculatethevaluesforforce,work, andpower involvedinwalking. We were able to calculate our power going up the stairs. The work energy theorem says that the net work done by force acting on an object is the the net change in kinetic energy of the object. Physclips ch 7 definition of work definition of kinetic energy. Calculate work and power exerted during an arm curl exercise. Work and power lab introduction does the amount of work that you do depend on how fast you do it. Work is expressed in newtonmeters, or the simplification, joules j. Power is the rate at which work is done or the rate at which energy is transfered from one place to another or transformed from one type to another. This method was proposed by rodolfo margaria 1 in 1966 and has gained wide acceptance as a means of determining anaerobic power, both due to its simplicity and repeatability. In the second part you will figure out the work done during various activities and compute the power expended.
That attraction arises from the earths large mass, not the fact that it is spinning. As technology, culture and brands drive continuous change, enwork designs for high functionality and adaptability. View lab report work, power and energy lab samantha wolter. In this lab, youll calculate your work and power for climbing a flight of stairs at different speeds. The process we learned is when something is changing in height. Both students will perform the experiment in the stairway that leads down into the gym locker rooms. It involves some simple calculations and thought problems involving work, potential energy and power following a physical activity in lab by the students. In this activity students learn how to use physics equations to calculate the amount of work their muscles do during an exercise. To investigate the concepts of work and power through direct measurement of the distance and time associated with climbing stairs and lifting weights. The weightlifter on the right takes 1 second to lift his weights, and the weightlifter on the left takes 3 seconds to lift his weights. Energy, work, and power and the related units of measure. Work joules force newtons x distance meters step 1. If we increase the displacement twice, work is also increasing twice.
Learn how to explain a phenomenonhow the gauss gun. As is implied by the equation for power, a unit of power is equivalent to a unit of work divided by a unit of time. The wingate anaerobic test is used to determine an athletes peak anaerobic power and anaerobic capacity. J and time is in seconds s, power is expressed in joules second, or the simplification watt w. There are only two relevant variables in one dimension. Work and energy goals to apply the concept of work to each of the forces acting on an object pulled up an incline at constant speed. The best advice i can give to you is to budget your time properly, dont wait until the last minute the night before to get your work done. During this process, the force on the cycle due to the road is 200 n and.
From the basic definition any units of work or energy and time can be used to generate a unit of power. For instance, when a block is being pulled with tension t by a string whose angle of inclination is. The young person climbed up a steep spiral staircase. Force is expressed in newtons n and distance is expressed in meters m. Work and power lab purpose to calculate the power output of a machine. Circle the letter of each sentence that is true about power.
For the remainder of this text, the term networkwill. Founded in 2002 by nobel laureate carl wieman, the phet interactive simulations project at the university of colorado boulder creates free interactive math and science simulations. Each group of students should consist of two students. Part numbering part number input power power cord ds1502af 115 vac us style ds1502bf 230 vac uk style ds1502cf 230 vac cont. Powerhouse lab included, labeled and organized all parts of the lab. Observe the output voltage waveform, scr voltage and gate signals for various firing angle 5. See how we help to enhance efficiency today while preparing for greater productivity tomorrow. Energy transferred to the object is positive work, and energy transferred from the object is negative work. The unit of work is the joule j consider a force that acts at an angle. Work, energy and power class 8 science notes khullakitab.
Work, energy and power key concept energy is the ability to do work, and may be obtained in many forms. Experiment 201 work, energy and power carl joshua a. A calculate the amount of work that ralph did on the car. It is designed to be a simple introduction to electrical theory and practice and, therefore, does not contain any difficult mathematics or complicated electrical theory. Learn how to quanitatively relate the new concepts of work and energy to concepts you are already familiar withforce and distance.
Title to study low pressure boilers and their accessories and mountings exp. Stay tuned for the latest news and updates from enwork. It can also be defined as the rate of change of energy. Lab report format exp 201 experiment 201 work energy. Find and record the potential energy of the weight. When you decrease the force acting on an object, the power increases. Choose from 500 different sets of work and power physical science flashcards on quizlet.
Stairclimbing power lab episcopal school of dallas. For a horizontal path, power of a certain body moving along this. I output more power than the class average which means i was working harder since our height was all the same and work can be expressed as mgh. Determine the weight in newtons of a weight using a. Conceptual physics textbook chapter 8, cpo textbook chapters 3 and. We determine the average power of a machine or device or person by dividing the work it does by the time it takes to complete it. Power, work and the waterwheel activity teachengineering.
The book will be of assistance to students taking a. Mathematically, it is computed using the following equation. Creating an electric battery out of an ordinary potato is a popular science project for middleschool students. This lab activity introduces the concepts of work and power to physical science students. To study low pressure boiler and their mountings and accessories. Work equals force times the distance through which the force acts. For instance, each time you do a pushup, you lift the weight of your body several centimeters, and the work that you do equals the force that you exert your weight times the distance that you lift yourself. Introducing basic network concepts 3 basetech networking concepts team 2230894 blind folio 3 figure 1. Heavy lifting it took the ancient egyptians more than 100 years to build the pyramids without machines like these. What we will be doing in lab today is utilizing a different method, borrowed from exercise physiology, to determine work and power. Energy lab key southeast missouri state university. A nonmetric unit of power commonly used in commerce and industry in the us is horsepower hp. How is the change in kinetic energy related to the net work done on the cart by the spring. Power work done energy used time time in the first part of this lab you will learn how the work done on an object is stored as potential energy of that object.
You will need a parent or friend to help you with this activity. To understand the concept of work to be able to calculate work for constant and nonconstant forces to understand the concept of kinetic energy to understand the relationship between work and kinetic energy equipment. When we lift a book away from the center of dear old earth, we do work on that book. Power of power of 1 w 1 w is work done at rate of is work done at rate of 1js. In a laboratory we attempt to evaluate the availability of the atpcp stores and the glycolytic energy system by measuring the amount of work an athlete can do in a short, maximal test. Complete the connections as per the circuit diagram. You can increase power by doing a given amount of work in a shorter period of time. The workenergy theorem says that the net work done by force acting on an object is the the net change in kinetic energy of the object. If work is in joules j and time is in seconds s, power is expressed in joulessecond, or the simplification watt w. Work done w is defined as the dot product of force f and displacement s. Lets have a look at the ideas we already have about work, power and energy.
Doing work either transfers energy from one object to another or transforms it from one form to another. This oer repository is a collection of free resources provided by equella. Keep the potentiometer r1 in minimum position maximum resistance in the circuit 3. Use of power lab and lab tutor in undergraduate medical education laboratory teaching. Phys 101 most of us love the dear old earth, in fact were quite attracted to it. The only special materials required are stairs, bleachers or risers. The purpose of this lab is to determine the power of a person lifting an object.
Work w is the energy transferred to or from an object by means of a force acting on the object. Learn work and power physical science with free interactive flashcards. We already said that both weightlifters are doing 1,960 joules of work. To compare the total work on an object to the change in its kinetic energy as a. Complete the prelab question as part of hw5, and turn it in with the rest of your homework by 9. Lab 8 work and energy l81 name date partners lab 8 work and energy l081 name date partners university of virginia physics department modified from p. Download work energy power problems with solutions. It should make logical sense and include all of the following terms.
But now, even tall skyscrapers can be built in a few years. The equation for power, p, is the work done divided by time t, p work t eq. This lab was adapted from addisonwesley goetsch 10202006 phy stair climbing lab. To find out how the power of his engine compared to that of a horse, watt measured how fast an average horse could do work. Conclusion therefore i conclude that work is related to. The international system uses joules j and seconds s for these, respectively.
There are several good examples of work which can be observed everyday a person pushing a grocery cart down the aisle of a grocery store, a student lifting a backpack full of books, a baseball player throwing a. Work, power, biceps, triceps, flexion, extension, lever, resistance, fulcrum, effort, joint. Coordinate all your classes and the homework required. How long does it takes a swimmer with a power output of 275 watts to accomplish 3600 j of work if she applied a 650 n force during that time with the same power output, how far did she swim. If some students feel left out, establish another club known as the pony club. An air track is tipped by inserting a block of measured thickness under one end.
Work power joule newton kgms2 joule second kg m2s2. Work and power lab with answer key by buckos science. Nov, 2012 i learned in this lab how to find the power output of a person. The gliders motion is recorded by a computer attached to a sonic motion sensor, as in the f ma lab. Your city wants to use hydropower instead of coal to make energy because they want to limit air pollution. To be specific, power is defined as the work done divided by the time that it took to do that work. The effectiveness of teamwork training on teamwork. Measure the height of the weight, ensure that the mass does not hit the ground before the car goes through the photo gate. Power is the rate that work is done, and when you exercise you do work.
Specifically, by doing an arm curl activity and measuring the distance that the weight travels students can calculate the work and power that their biceps and triceps output. In this lab you will examine three physical quantities. Your weight is equal to the force required to walk up the stairs at constant speed. An introduction to labview for 4 th year projects 09.
Materials stopwatchtimer, meter stick, stairs, 3 machines 3 humans procedure 1. Therefore, i conclude that work is related to power. Stay connected to your students with prezi video, now in microsoft teams. Power can be determined using work by considering the time. Phet sims are based on extensive education research and engage students through an intuitive, gamelike environment where students learn through exploration and discovery. In most commercial batteries, electricity is generated by a chemical reaction between two electrodes copper and zinc and an electrolyte sulfuric acid.
It is from its definition that power is the rate of doing work at specific displacement. Europe style dual 15 volt benchtop power supply lab test equipment. To determine the energy burned during that exercise. Suppose you lift an object steadily at a slow constant velocity near the. Work and energy the purpose is to check the work energy theorem. Safety do not physically engage in this activity if you have an injury or a respiratory or cardiovascular condition.
To determine the work and power required to walk and also to run up one floor of stairs. It will be easy to fall behind and difficult to catch up. Work and power lab with answer key by buckos science corner. The concept of horsepower the english unit for power tells you how much energy a car generate in a given time period. Attach a weight to a string and attach it to the car over the pulley.
Thornton phys 1429, spring 2011 lab 8 work and energy energy is the only life and is from the body. Learn how to relate the new concepts of work and energy to concepts you are already familiar with force and. James watt was a british scientist who invented the steam engine. Introduction to electrical installation work is, as the title implies, a first book of electrical installation practice. Power is defined as the rate at which work is done. But the amount of time in which you do work does affect your power the rate at which work is done. Students with health problems should not perform the following activity. Class 11 physics revision notes for chapter 6 work. Work and power lab millersburg area school district. Science project on electricity in a potato sciencing.
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