Physics lab assignment

M7alf

Kinetic Energies and Momentum - A Virtual PhET Lab

After completing this lab activity, the students should be able to:

• Calculate kinetic energies
• Calculate momentum and final velocities
• Write a lab report

Lab Report

The lab report must include the following:

• Title
• Introduction
• Experimental Details or Theoretical Analysis
• Results
• Discussion
• Conclusions and Summary
• References

ACS Format for Laboratory Reports  (Links to an external site.)

An example of a lab report is given on the following website:

Professor K - sample lab report (Links to an external site.)

Lab Activity

• This lab requires you to produce a lab report to, determine "Momentum, Final Velocities, and Kinetic Energy.â€ť This is the â€śTitleâ€ť of your lab report.
• Read the relevant chapter on momentum and kinetic energy and add an â€śIntroduction.â€ť

You conduct this lab by connecting to the PhET website by clicking on the link given below (or where applicable through the embedded simulation on the lab page):

PhET Interactive Simulations

• For this experiment, you use the â€śIntroâ€ť section of the lab. After you click the intro section of the lab, select "Velocity," "Kinetic Energy," and "Values" boxes (upper right-hand corner). Then, move the "Elasticity" scale to 100% elastic. Then check the box "More Data" (bottom left-hand side). Now all the values will appear on the screen.  Now you can change the mass values and the initial velocity values as per the scenario given below, and kinetic energy, momenta, and velocity values will appear on the screen. This information constitutes the â€śExperimental Detailsâ€ť section of the lab report. You must keep a record of all the values appearing on the screen as experimental values for the scenario. These values form part of the â€śResultsâ€ť section of the lab report. Now, complete the theoretical calculations of kinetic energy, final velocities, and momenta for each scenario using relevant equations. These calculated values also form the â€śResultsâ€ť section of the lab report.
• Now, you can complete the â€śDiscussionâ€ť section of your lab report by comparing the values and discussing any differences in the theoretical and experimental values and any other information relevant to the experiment.
• Complete the lab report by adding a summary to the â€śConclusionâ€ť section of your lab report.
• Submit the lab report to the relevant Canvas Dropbox

Newton's second law & momentum (video) | Khan Academy (Links to an external site.)

Lab Scenario

Set the pink ball mass as 2 kg mass and the blue ball mass as 3kg. The position of blue ball could be -1 and pink ball could be +1. Set the initial velocity of pink ball as -1.5 m/s and that of the blue ball as +3 m/s. Run the experiment and note all the relevant experimental values.

1. Calculate the initial and final kinetic energy values for both balls separately and then the total.
2. Calculate the momenta before and after the collision for each ball.
3. Calculate the final velocity values for each ball.

• 11 days ago
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