Jump to content
Sign in to follow this  
  • entries
  • comments
  • views




In class we have been talking about power and how to calculate the power. Power is the rate at which work is done, the same amount of work can be done with different supplied if the time is different. If an 8 kg box is raised to a height of 2 meters in .5 seconds, what amount of power was supplied. To find the power we have to use to formula that we used in class which is work over time. To find work we must multiply the force times the displacement. We would multiply 8 kg, 9.81 m/s^2 and 2 meters to find the work. Our work in this problem is equal to 156.96 Joules. Then we would divide our work by the time that is provided for us .5 seconds. Once you have divided Joules/second you would get the answer 313.92 watts. This tells us the rate at which the work is done.


Recommended Comments

There are no comments to display.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Add a comment...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Terms of Use

The pages of APlusPhysics.com, Physics in Action podcasts, and other online media at this site are made available as a service to physics students, instructors, and others. Their use is encouraged and is free of charge. Teachers who wish to use materials either in a classroom demonstration format or as part of an interactive activity/lesson are granted permission (and encouraged) to do so. Linking to information on this site is allowed and encouraged, but content from APlusPhysics may not be made available elsewhere on the Internet without the author's written permission.

Copyright Notice

APlusPhysics.com, Silly Beagle Productions and Physics In Action materials are copyright protected and the author restricts their use to online usage through a live internet connection. Any downloading of files to other storage devices (hard drives, web servers, school servers, CDs, etc.) with the exception of Physics In Action podcast episodes is prohibited. The use of images, text and animations in other projects (including non-profit endeavors) is also prohibited. Requests for permission to use such material on other projects may be submitted in writing to info@aplusphysics.com. Licensing of the content of APlusPhysics.com for other uses may be considered in the future.

  • Create New...