Investigatory Project—Lever

A more deft use up of lever A heavier repeal Introduction A. Background of the ask Buildings, infrastructures and a like were built using the help of machines. But pull in you ever ruminated how ancient structures like pyramids were built? mere(a) machines figured it out. Simple machines atomic issue forth 18 any device that solo requires the application of a mavin force to work. It is a tool utilize to make work easier. It gives robotlike advantage. This means that if you use a lever and the mechanistic advantage it provides, you lionise lift an physical target thats much heavier than you are because the lever multiplies your apparent movement.Lever, it is often apply to move heavy shipments with less grounds. It is a rigid object that is apply with an appropriate fulcrum point to multiply the mechanical force that tail assembly be applied to another object. B. Statement of the problem A prove on the proficiency of lever in lifting heavy objects. Specific Ob jectives To move on a tabletop lever and investigate how changing the continuance of the exploit work up touch ons the amount of driving it takes to lift an object. To discover other factors that can affect the proficiency of lever. 2 E. Review of related literatureThe following definitions are the terms and concepts regarding the said investigatory plan. Simple machines is any device that only requires the application of a single force to work. It is a tool used to make work easier. lever magnifies force or velocity. It is often used to move heavy loads with less parturiency. It is a rigid object that is used with an appropriate fulcrum or pivot point to multiply the mechanical force that can be applied to another object. Fulcrum , the support astir(predicate) which a lever turns. Beam, The eject of a balance from which weighing pans are suspended. Parts of the lever (in the experiment, still undefined) Effort end Effort tree branch Load end Load arm *The showtime Class Lever, chip Class Lever and the Third Class lever. The only difference among them is the location of the fulcrum. *Levers help you move items that are very heavy. In the First Class lever the fulcrum is located in the middle. The load is on ace end and the force is on the other. (crow step) Second Class the fulcrum is on the end, the ohmic resistance force, the load, is in the middle, and the exploit is at the other end. (wheel cadencerow) The Third Class fulcrum is on the end of one side, the driving force is in the middle, and the resistance force, the load, is at the the top. baseball bat) *Levers are easy to spot because they help us in our lives. Some examples are see-saw, claw hammer, crow bar, bottle opener, Piano keys, and automobile jacks. Bibliography Definition of terms McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright 2003 by The McGraw-Hill Companies, Inc. http//encyclozine. com/science/physics/machines http//encyclopedia2. the unornamentedd ictionary. com/simple+machine http//www. thefreedictionary. com/ convey Methodology A. Materials and equipment rule (with centimetres) Plastic beauty Masking put down Scissors penitentiarycil scoop box with lash in it Marbles (in same sizes)B. Procedure To number one this project, you leave affect to build your lever. The ruler will be the conduct for the lever. Tape a bar of trounce to one end of the ruler. The soap is the load you will be trying to lift. Next you will destiny to construct a container out of your elastic dish aerial to hold the stain in. The bobby pin and the marbles youll place in the bag will be the effort. As you minimal brain damage more marbles, you are increasing the weight in the bag and thus, the effort until you eventually have plenty effort to lift the soap bar. Put a piece of tape approximately 1 cm (cm) from the top of a plastic bag .Fold the tape- put down part in half. development a pair of scissors, cut a slit long enough to allow the ruler to slip through. strip the free end of the ruler into the slit. Tape the bag to the ruler so it does not slide around. Be careful not to tape the bag closed, as you will need to add marbles in it. tape pencil to the edge of a table. Place your lever on the fulcrum. The bar of soap should be resting on the table, and the bag for the marbles should be abeyance over the edge of the table. Position the ruler so that the length of the effort arm is 6 cm. You can use the markings on the ruler to assess 6 cm.Add marbles to the bag, one at a time, until the bar of soap lifts off the table. Continue increasing the effort arm length by 2-cm increments until the measures 24 cm. Materials and Equipment Metric ruler (preferably one that is stiff and has cm markings) Plastic sandwich bag (1) Tape (preferably masking tape) Scissors Pen or pencil Bar of soap (still in its packaging) Pennies (approximately $3 expense alternatively, marbles, beans, or some other small numerous item wil l work) Lab notebook Graph paper Experimental Procedure 1. To aim this project, you will need to build your lever.The ruler will be the beam for the lever. Tape a bar of soap to one end of the ruler. The soap is the load you will be trying to lift. 2. Next you will need to construct a container out of your plastic bag to hold the pennies in. The bag and the pennies youll place in the bag will be the effort. As you add more pennies, you are increasing the weight in the bagand thus, the effortuntil you eventually have enough effort to lift the soap bar (the load). a. Put a piece of tape approximately 1 centimeter (cm) from the zipper part of the top of a plastic sandwich bag.Do this on both the inside and the outside of one side of the plastic bag. See Figure 2. a. below. b. Fold the taped section in half, width-wise. Using a pair of scissors, cut a slit long enough to allow the ruler to slip through. See Figure 2. b. below. c. Slip the free end of the ruler (the effort end) into the slit. Tape the bag to the ruler so it does not slide around. Be careful not to tape the bag closed, as you will need to add pennies inside it (the effort). 1. ncrease the length of the effort arm by 2 cm (total length should now be 8 cm) and repeat step 5 again.Did it take more or fewer pennies to lift the load? Record your findings. 2. Continue increasing the effort arm length by 2-cm increments and retrying the experiment until the effort arm measures 24 cm. Dont forget to record all the selective information in your data table. 3. learn your data. You can make a line graph with the length of the effort arm on the x-axis and the number of pennies it takes to lift the load on the y-axis. Do you see a pattern? What happens when you double the exceed? What happens when you quartette the distance? To use the computer to make your graph you can visit the lay down A Graph website. . You are trying to determine the relationship amongst two variables the effort ( of pennies) it takes to lift the load (bar of soap) and the length of the effort arm, so choose the XY graph. b. Select the Data Tab, fill in ?The graph call ?X-axis label (remember, the x-axis is the length of the effort arm) ? Y-axis label (remember, the y-axis is the number of pennies is takes to lift the load) ? In the Data Set box, tell the program you have 12 data points. ?For each point, fill in the length of the effort arm (x) and the number of pennies (y).So, point 1x would be 6 since you took your first data reading when the effort arm was 6 cm long. Point 1y would be the number of pennies, recorded in your data table, that it took to lift the soap bar at an effort arm length of 6 cm. ?You can use the remaining options to make the font styles and colors of your chart. c. When you are done, print it out. Variations What happens if you double the load by adding two soap bars? Does the effort (number of pennies in this science project) essential to lift the load also double? What if you tripl e or quadruple the load? Use a kitchen scale to determine how much the load (soap bar) weighs and how much the effort (number of pennies needed to lift the soap bar) weighs. Can you use this information to calculate how much effort it would take to lift you? In your background research you learned that there were several classes of levers. In the project above, you built a class 1 lever. Try building a class 2 lever, too. Compare the class 1 and 2 levers. Do they require the same effort to lift the load? Remember to keep the distance between the fulcrum and the effort end the same when comparing the levers