Physics Lab write up 10

# The kinetic energy of an object is the energy which

This preview shows pages 2–3. Sign up to view the full content.

: The kinetic energy of an object is the energy which it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its current velocity. ...( en.wikipedia.org/wiki/Translational_kinetic_energy ) Rotational energy : The kinetic energy of a rotating rigid body otherwise at rest ( en.wiktionary.org/wiki/rotational_energy ) Translational energy : The kinetic energy of an object is the energy which it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its current velocity. ( en.wikipedia.org/wiki/Translational_energy ) Data: (look at attached excel sheet) Analysis: (look at attached excel sheet) Results and Conclusion: This lab was executed to help the students know and understand how this experiment provides a method for checking the conservation of energy principle which states that changes in potential energy of the falling mass and the kinetic energy by finding the kinetic energy of a rotating disk and falling mass. Possible discrepancies in our data would be not accounting for friction or the energy lost to sound, wrong calculations, rushing through the experiment too fast, not starting at the same initial spot every time, and not stopping the data collecting when the weight hanger starts to come back up after its first big initial drop. In our experiment the percent differences were over a hundred (130%-150%), which could

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
be, because we did not account for friction or the energy lost to sound and heat but our percent differences increases slowly as the weight of the falling mass increases. For example at 0.025 kg we had a percent difference of about 130% while at .125 kg we had a percent difference of roughly around 150%. Questions: 1. Is energy conserved? Answer: According to our data results, the energy is not conserved. 2. What are the potential sources of error (percentage difference)? Answer : Potential sources for this error could be the fact that we did not account for friction or the energy lost to sound and heat 3. Does the percent difference vary with the value of the falling mass? Answer: The percent difference slowly increases as the falling mass is increased. 4. Why does the percent difference vary, or not vary with the value of the falling mass? Answer: The reason for this variation between percent differences is that as the mass is increased, there is more energy lost to friction and heat and sound that was not accounted for.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern