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Force, mass, acceleration lab Problem: What are the relationships among force, mass, and acceleration? Background: When mass is constant, force is proportional to _____ When force is constant, acceleration is inversely proportional to _____ Hypothesis: With a constant force, as we increase the mass of the car, the acceleration will ___________ because _____________________. And with a constant mass, as we increase the force on the car, the acceleration will _________ because _________________________ Procedure: 1. Use the scales, which measure Newtons (force) to pull the car with a constant force. 2. Change the mass of the car by using weights. 3. Measure the acceleration by using the ticker tape timer, to get a general idea of the acceleration that occurs. 4. Do several trials with several different weights, also, do several trials using different force with the same mass. 5. Compare each of the ticker tapes to determine how the mass is affecting the acceleration, when using a constant force, and how force affects acceleration using a constant mass. Remember that each space between 2 dots = 1/60 of a second. 6. Make sure you record your data and label your ticker tapes, so you can see your results. Data: What data are you collecting? How are you going to collect your data? How are you going to record your data? What is that data going to show you? How can you organize the data? How can you graph the data? What will represent acceleration in this lab? Can we calculate acceleration using the ticker tape timers? (Think change in velocity divided by change in time.) Data analysis: 1. Create a representative graph to show how mass affects acceleration when the force is 1N. Use these 5 equal increases for your masses: 0.5kg, 1.0kg, 1.5kg, 2.0kg, 2.5kg 2. Create a representative graph to show how an increase in force affects acceleration when the mass is 1kg. Use these 5 increases in force: 0.5N, 1.0N, 1.5N, 2.0N, 2.5N Remember that F=ma, m=F/a, and a=F/m • What was the purpose of this lab? (The purpose of this lab was to…..) • What did the data show you and was your hypothesis supported by your data? (summarize what you found out during this experiment) • How can you explain your data? (why did the acceleration do what it did when you changed the mass or the force) • What errors occurred and how might error have affected your results? (really focus on this section, because there were lots) • How could you improve the experiment ? • What other questions related to this experiment do you have?