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

**Problem Set A**

**Problem 14: **

A worker applies a 179 N force to lift a 37.9 kg object to a height of 3.18 meters at a constant speed of 1.4 m/s. What is the increase in potential energy of the object (in Joules)?

- Read the problem carefully and diagram the physical situation
- Identify known and unknown information in an organized manner
- Take the time to plot out a strategy prior to beginning the solution
- Identify an appropriate formula to use
- Perform step-by-step algebraic manipulations

Work, energy and power concepts can be reviewed on the Set A Overview page.

Further information about the concept of and equation for potential energy is available online at The Physics Classroom.

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