4/24/2023 0 Comments Purpose of force of gravity lab![]() It’s also going to make up 99 extra experiments by using random points within the range of each of your measurements, and it will use that to figure out a range for the slope and intercept of your graph. (Better (more precise) equipment would result in smaller data points). ![]() ![]() Then when you graph it, it will put range bars on every data point to help you see how big the data point is. So when you’re entering data into LinReg, it will want you to write that as 0.6 N for the measurement and 0.1 N for the uncertainty (half the range). For example, when you’re reading this spring scale and want to say what the force is, you can say it’s definitely between what and what? Great. Instead of graphing this by hand, we’re going to start using a computer program called LinReg to do that work for us. Using LinReg makes graphing easier (no more hand-drawn graphs), and it also forces us to think about the range of every measurement. So you know what to do now? After you make all the measurements (of weight and mass), what will you do with the data? (Make a graph.) Perfect! Graphing-now with more computers! You can write that down as the objective. Okay, so what relationship can we find? The relationship between….? (Weight and mass.) Great. How can we measure the mass? (Just use the numbers on the things?) That works! What else can we measure? What’s the difference between mass and weight? Which changes when you go to the moon? Your mass or your weight? (Weight.) Okay, so they’re definitely different. Is it balanced or unbalanced? (It’s balanced.) How do you know? Great, so how does the spring force compare to the gravitational force? (They’re the same.) So we can use the spring scale to measure the weight (Fg) as long as we keep the hanger at a constant velocity. What does this scale measure? Okay, could everyone sketch a quick FBD for the hanger, then? What tool could we use to measure it? (The scale thing.) Oh. Actually, we’ll always use that same sort of procedure, and soon enough you won’t even need me to walk you through it.Īnyway, what could we measure about this really cool thing? What do you mean by weight? (Gravity.) Gravitational force? (Yeah.) Okay, great. We’ll follow that same sort of procedure of setting things up. We’re going to do this just like the first experiment. Let’s go next door and look at something cool.Īre you ready? Here we go. Observe an interesting phenomenonīring your packet and pencil. We tend to do them at the same time and to post-lab them together. In the middle of our Balanced Forces unit, we do a couple of experiments to come up with equations for some of the types of forces we’ve been talking about while drawing qualitative free body diagrams.
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