**Unit 5: Work, Energy and
Power**

**Problem Set C**

**Problem 11: **

A 3.62 kg physics cart starts from rest at the top of a .762-meter high incline. Determine the speed (in m/s) of the cart after it has rolled to a height of .181 meters. (Neglect the effect of friction forces.) Enter your answer accurate to the third decimal place.

- Read the problem carefully and diagram the physical situation (initial-final state diagram and/or work-energy bar chart)
- Identify known and unknown information in an organized manner (write on diagram)
- Take the time to plot out a strategy prior to beginning the solution (cancel terms in work-energy equation and perform conversions when necessary)
- Identify an appropriate formula to use
- Perform step-by-step algebraic manipulations

General information about work and energy problems is described on the Set C Overview page.

A detailed discussion of how to analyze physical situations using work-energy bar charts is provided online at The Physics Classroom.

A detailed description of the work-energy relationships for situation in which total mechanical energy is conserved is provided online at The Physics Classroom.

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