Masses and Springs Phet Simulation Physics 2010

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Name :                                                                                                  Masses and Springs

Go to  http://phet.colorado.edu/simulations/sims.php?sim=Masses_and_Springs

 

and click on Run Now.

 

Objectives: 

 

·    Understand the relationship between force, displacement, and spring constant for a mass hung on a spring (as governed by Hooke’s Law).  

 

Take a few minutes to orient yourself with the simulation. Play with all of the features.

 

You will play the role of scientist.  You will ask intelligent physics related questions and then use the simulation to answer your questions.  When you ask and test your questions, it is important to isolate one variable; otherwise it is difficult to understand what is causing a certain change in behavior.  Perhaps some variables cause no change in behavior and that is important to note also.

 

You will focus on the following in your questioning and testing:

Hooke’s Law—the stretch of the spring (put friction on to get it to stop bouncing)

 

 

Make sure you write your questions as specifically as possible. Then, experiment to answer your question, organizing your data in a table. Finally, answer your question with as many details as possible!  You will ask as many questions as it takes to completely investigate all aspects of Hooke’s Law. 

 

Answer the following questions.

 

 

  1. Determine the spring constant, k, of Spring 1, by using Hooke’s Law.  Take three different measurements (since 3 masses) and do three calculations and average your k’s to get a more accurate answer.  By applying lots of friction, you will be able to get your mass to hang still.  Show a table of your data and your calculations of k.
  2. Determine the three unknown masses: Red, Green, and Gold. Use Hooke’s Law to determine the masses. Show all data and calculations.

 

 

The next four questions ask you to investigate the effects different parameters have on Hooke’s Law. Answer the question and tell what you did on the simulation to come to your conclusions.

 

   3. Explain the effect of mass on Hooke’s Law.

 

   4. Explain the effect of gravity on Hooke’s Law by checking out what happens in the four different locations, as well as when there is no gravity.

 

    5. Explain the effect of the spring constant, k, (stiffness of spring) on Hooke’s Law.

 

   6. Explain the effect of friction on Hooke’s Law

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