The springs are 6 cm long and 0.8 cm in diameter. LEVER LAB Part 1 - 1st Class Levers In this part of the lab you will find out how changing the position of the resistance arm affects the mechanical advantage. Thus, the spring scale/string is in static equilibrium. The scale on earth reads 60 grams. 12. On the moon the scale would read. Lab Manual • Each lab contains complete instructions – there is no lab … Spring scales can be used to measure a variety of forces. F spring … Click on the picture or the program title to go to the program or click on "See Resources" to see a description of the program and all the resources that go with this program. Procedure: Set up the inclined plane so the height of the ramp is 30 centimeters. When our block is at rest, and we pull it with the spring scale, as we increase the tension the block stays at rest, until we reach a point where it begins to move. Which type of simple machine is pictured here? 1. Are measurements ever exact? To the 200 line. Lab Materials . Use the search engine to help you find a particular lab. However, you may use your lab manual, graded lab reports, notes, and textbook as resources for this exam. So we find that the static friction has a maximum value. Both the resistance and … Then calculate what the friction force must have been. Hold the spring scale in the vertical position with the small hook downward. Friction Lab Friction is a force that occurs when two surfaces TOUCH. In the photo which labeled part is the fulcrum C B D A 15.what is the effort force in the lab photo? Your answer will be graded based on the accuracy of your result and proper reporting of uncertainty, significant figures, and units. inches). Up to that point, friction has been merely balancing the force we are applying with the spring scale. An advantage would be the accuracy of a spring scale… Find the force required to lift your object. 0.008 kg Suppose the ball was floating in outer space (away from the gravity of the earth, friction, or any other influence) and that Newton's Second Law holds. Measure the length of the ramp (inclined plane) in meters; record. For this lab in particular, a disadvantage is that some of these objects are not made to hook onto a spring scale, thus skewing the results. Laboratory scales for scientists and laboratory professionals. This accessory kit contains 6 springs that are ideal for physics experiments. 2.Compare the magnitude of the forces on both spring scales after you pulled the 10 N spring scale suspended on the 5 N spring scale. Use the balance or electronic scale (but not the spring scale) to determine the mass of the rubber ball in kg, and write it in the space below. Our selection of lab scales include precision balances, analytical balances and moisture analyzers. Hang masses from springs and adjust the spring stiffness and damping. In this lab you will investigate the factors that affect friction. Lab 7 Buoyancy Experiment Type: Cookbook Overview In this experiment, ... Part III: Finding the Specific Gravity (using a spring scale) Now let’s use our knowledge of the buoyant force to determine the density! Lever Wedge Incline plane Wheel and axle 13.In the photo, which part provides the resistance force? Then, calculate the weight needed to lift each load in the pulley systems. a) 60 grams b) 10 grams c) 600 grams d) 0 grams. A chart shows the kinetic, potential, and thermal energy for each spring. Pull on the spring scale until you have a good kinesthetic sense of a one Newton force. Student Exploration: Determining a Spring Constant Prior Knowledge Questions 1. Calculate the efficiency (work lifting the mass/work pulling the spring scale x 100%) and mechanical advantage (weight lifted/spring scale force) for one trial of apparatus A & B (and C if you did it). Having trouble with this tricky physics problem, anyone have an idea of what the answer would be? Assume that the spring scale is being pulled down similar to each of your labs. This course includes the option of hands-on or dry lab activities. It works by Hooke's Law, which states that the force needed to extend a spring is proportional to the distance that spring is extended from its rest position. A spring generates a force proportional to how far it is stretched (and acting in the opposite direction to the stretch) F spring = −k × stretch If we adjust the coordinate system so that x = 0 corresponds to the spring being unstretched, then the stretch of the spring is simply equal to x. Then place the pumpkin on the spring scale and record its weight. Appendix B. Make chemistry labs easier easy with a digital scale! Transport the lab to different planets. Digital readouts: The next most common case involves measurements made with a digital readout. At the grocery store, you put a watermelon on a produce scale. How far will the spring stretch if you add another watermelon of equal mass? In this lab, we will use spring A spring scale or spring balance or newton meter is a type of mechanical force gauge or weighing scale.It consists of a spring fixed at one end with a hook to attach an object at the other. Answer: When the spring balance with stone is immersed in water, the stone experiences an upward force called buoyant force. Zero the spring scale as follows. This causes the spring to stretch as shown. Place the object in the tray c. With the spring scale, lift one side of the object 10 cm off the tray d. The Tie a string around one side of your object and attach it to your spring scale b. Attach one end of the string to the cart and the other end to the spring scale. Give the value of the pull force that you measured. Ruler (c) Clay block (d) Wooden cube and clay (b) Spring scale (a) 14. Below are all the labs available on this site. 3) control variables 4) Recognize that some things are hard to measure like friction because the spring scale needle vibrates. A spring scale is used to exert a force ... the entire class works together and compiles data in an effort to answer a … The spring force becomes. Liquid water is more dense than ice because a) A liquid H 2 0 molecule has more mass than an ice H 2 0 molecule. 7. You can even slow time. Explain your answer using a force diagram and net force equation. • Dry labs have no required materials. a. Or see how the physics behind them works with mechanical balances and scales, including models from Ohaus. Purpose: In this lab we will experimentally calculate the mass of a suspended weight by placing the weight in static equilibrium and measuring the tension in 6 locations. Three springs have a spring constant of 5 N/m and the other three have a spring constant of 15 N/m. 20. With nothing attached to the hook, make sure the scale reads zero. NCERT LAB MANUAL QUESTIONS. Cart meter stick 5 N & 10 N spring scale. Based on your lab work, determine the mechanical advantage for each pulley system. Use Newton’s Third Law to explain your observations in Post-Lab Questions 1 and 2. ... Also, answer any questions which the TA assigns. How can we tell if our measurements have been affected by error? Spring Scales Tray Ruler Procedures Lifting Force, Static Friction, Sliding Friction 1. Materials Needed : 4 wood blocks for each lab group (approximately 2 inches x 3 inches x 6 inches is a good size because then the ratio of areas of the different sides is simple- 6 sq. Each scale will read 10 kg B. The lower FBD depicts the applied forces for the submerged mass. (I recorded the height on the lab write-up for you). For the parent-teacher on a budget, we offer economical triple beam balances and electronic digital scales. Inclined Plane Lab ... Once the inclined plane is set up, a cart is placed upon the inclined plane. Answer the questions on the data table page. Pull the box with the spring scale at constant velocity, exerting the force at an angle of 30° to the horizontal. How can a measurement that is uncertain be useful? inches by 24 sq. What will be the readings on the scales? 4. Homework Statement A 20-kg fish is weighed with two spring scales, each of negligible weight. Question 1: Why does the pointer of a spring balance move up when the stone suspended from it is immersed in water? The second team member will hold the third string-loop and its spring scale, adjusting the position of the string's loop on the washer until the spring scale reading is between 10 N and 20 N. 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