Of course, friction must be brought into the energy approach as well. Assume the mass starts from rest and is displaced a distance x from its initial position. The masses must be able to move at least 50 cm before hitting the ground, to collect enough data to analyze. Also, make sure that the rising mass does not hit the pulley wheel.

They must be included in your report. Similarly find an equation relating the work done by T2 to the change in energy of the m2-earth system.

Steady the masses so that they are not swinging. Change the masses on each side of the string according to the table below, and repeat steps 2 through 7 until all combinations of masses have been tested twice. Hence, one might expect elevator systems to be based on this simple design, with the two objects being the elevator cabin and a mass of approximately equal weight.

Loop your string over the pulley, and connect masses on each Atwood machine lab report of the string while holding the wheel stationary. We could also adopt an energy approach to this problem.

To determine a sign convention which direction is positive and which is negative for this problem is important; and, since each object has its own separate subsystem, we can assign a different sign convention for each of them.

We can then relate the frictional force to the difference between the ideal and experimental accelerations.

Only deviations from this equality cause acceleration to occur. The work results in a change of energy, both kinetic and gravitational potential energy.

The "system" could be m1 alone m1 and the earth m1, m2 and the earth Determining the system determines whether a force is identified as external or internal and in some cases whether we talk about work or potential energy.

Repeat steps 2 through 5 once more, using the same combination of masses. From the two values of slope you obtain, find the average value of the slope. One of the first steps in the energy approach is to determine the "system" for which we are calculating the energy. The recommendation is always to pick the positive direction as the direction of the acceleration in the system.

Derive an expression for the acceleration; it should have the form Of course, this is an idealized calculation, and we cannot expect to find this acceleration experimentally. Consider the variables in equations 1 through 4 to answer this question!

You should either stop the falling mass just before it hits the floor, or put something underneath it to cushion the landing. Each combination represents a trial, and you will repeat each trial twice.

Measurements Find the masses of two sinkers. The calculations are sensitive to these mass measurements, make them carefully. Procedure Before conducting any trials, prepare the computer for data collection: Looking at the rotating wheel of the pulley, you should see that this distance blocking the photogate beam is the rounded path near the end of a single spoke of the wheel and the space following it.

Assume that the string is massless and does not stretch and that pulley is massless and frictionless. Hence, the direction of the acceleration vector next to each mass in the diagram above indicates the positive direction for each subsystem.

That is, the work associated with the frictional force the work done against the frictional force should equal the observed change in energy. For the systems above gravity and tension are external gravity is internal, tension is external gravity and tension are internal If we consider m1 and the earth as our system, then the tension is external to the system, and does work on m1.

Speaking of motivation, you might be wondering what an Atwood machine may be used for!Lab Report 8: Atwood’s Machine. 03/23/ James Allison. section Group 5. James Allison, Clint Rowe, & William Cochran.

Objective: We will determine the acceleration of the weights of an Atwood’s Machine, both. VF8. Modified Atwood’s Machine Lab Included, labeled and organized all parts of the lab report.

Data section.

Report abuse. Transcript of Atwood's Machine Conclusion. Our Data Acceleration Vs. Mass Difference Acceleration Vs. Total Mass Atwood's Machine Lab Conclusion Conclusion The purpose of this experiment was to use a Photogate to determine the relationships between masses on an Atwood's machine and acceleration.

Essays - largest database of quality sample essays and research papers on Atwood S Machine Lab Report. 51 General Physics Lab: Atwood’s Machine Introduction One may study Newton’s second law using a device known as Atwood’s machine, shown below.

It consists of a pulley and two hanging masses. PHY Lab 4 - The Atwood Machine The purpose of this lab is to study Newton’s second law using an Atwood’s machine, and to apply the law to determine the acceleration due to gravity experimentally.

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