# Homework Help-Physics 211 Lab#3: Unbalanced Forces

Homework Help-Physics 211 Lab#3: Unbalanced Forces

Physics 211 Lab#3

Instructor:

Group Report: Unbalanced Forces

Students:

Date: September

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Abstract:

In this lab, we worked mostly on Newton second low. We worked on a formula, which was F=ma. We got the measurement from the tool that we used to get the first measurement.  We mostly wanted to get the acceleration from Newton’s second low. We follow the instructions on the procedures to get exactly what we were asked to do. We fist measured each mass container from the 12 pennies and the string. We also assumed that all of the penny masses are equal. Then we moved on to step 2, which stated that we must attach a RMS devise on the top about 2m above the floor. After we got the measurement, we moved the pennies from inside of the container to the other. And after that, we plotted in the data after getting them into Excel program so we can plot and get the needed graph. After that, I shifted many pennies from one container to another so we can get different measurement. Lastly, we wrote the x-axis for the (M-m) and the y-axis for the y-axis. We worked on the formula that we got from the instructor, which was F=ma. We got new measurement from the Excel program by writing the date for only the acceleration and the (M-m). Then, for the last thing we needed to find g.

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Procedures:

First, we assume that all the penny masses are equal. We measure the masses of each container, the 12 pennies that were given to us by the instructor and the string. Then, we attach the RMS at the top about 2 m above the floor so we can get the measurement and we connect the sting to both of the containers. The first one we drape the string over the elevated pulley. The second one we attach it as an illustrated above. Then, we adjust the length of the string so that m doesn’t hit the pulley when M is on the floor. And we start with 6 pennies in each container so that m=M. On our second step we launch the Logger Pro and then pull down and there was a note that states on the experiment we must drag the RMS to the right side box and calibrate the position not the angle. On step number #4, we set the calibration of the RMS by setting the diameter within Logger Pro and measuring the diameter of the pulley. On step number #5, we shift 1 or 2 pennies from m to M so that we can get M accelerate smoothly downwards when released from rest. We made sure that every container has an organized string when we release them. On step number #6, we measure the acceleration (a) by liner fit into the Logger Pro. On step number #7, we skipped it. On number #8, we shift an additional penny from m to M. We do repeated runs using number #6 methods. And on number #9, we get the data from number #8 and plot a plot which graphs the acceleration on the y-axis and the x-axis.

Data:

 10 0.229 15 0.808 20 1.315 25 1.67

Note: The y-axis: m/s^2 and the x-axis: gram.

 g Slandered Delta (%) 2.78 9.81 71.6% 6.533 9.81 33.9% 7.908 9.81 23.3% 8.102 9.81 19.2%

Analysis and Error:

The string sometimes gets loose and falls from the scale itself. And it also gives us false readings. The acceleration has increased by in unbelievable way. Then we had the Delta errors and they were incorrect.

Homework Help-Physics 211 Lab#3: Unbalanced Forces