Work, Power & Strength

# Work, Power & Strength - Conceptual Physics Work Power...

• Homework Help
• 4

This preview shows pages 1–2. Sign up to view the full content.

Conceptual Physics Work, Power and Strength Power is often associated with mechanical engines, or electrical motors. Many other devices also produce power. Light bulbs dissipate power in order to provide light. The human body converts stored energy in food into heat, and in turn into mechanical energy through muscles. Anything that produces power including the human body is subject to the same laws of physics that govern mechanical processes. Purpose: To investigate the power produced by different muscles in the human body to do various athletic exercises. Background: Remember POWER = WORK / TIME . The muscles in the human body are capable of applying a force through different distances. So the body is capable of doing work. But remember, that an applied force can only do work if it is in the same direction as the resulting displacement. For example, if a person runs up the stairs, the WORK done is lifting the persons WEIGHT up. So the DISTANCE the WEIGHT is lifted is just the vertical height the person climbs – not the distance along the stairs. If the time it takes to get up the stairs is measured, the power output of the body can be determined. This same type of analysis can be used for almost any physical activity. NEEDED EQUATIONS: Work = Force x displacement ~~~ W = F x d Power = Work / time ~~~ P = W / t 1 pound = 4.45 Newton Procedure: - In this lab, the following activities will be tested and compared. Push-ups, running up stairs, curling a mass & dragging a weight - Come up with a hypothesis on which exercise will provide the largest value of power and work. - First the group must decide which member(s) will be performing each activity. All members should perform all the activities, but if all members are unable to, at least one member should perform all of them. - Once it is decided who will perform the activities, the group must decide how each activity can be tested, and what is actually being tested. Several values must be known in order to find the power of an activity.

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

This is the end of the preview. Sign up to access the rest of the document.
• Fall '13

{[ 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