A 54.0-kg skateboarder starts out with a speed of 1.70 m/s. He does +80.0 J of work on himself by pushing with his feet against the ground. In addition, friction does -265 J of work on him. In both cases, the forces doing the work are nonconservative. The final speed of the skateboarder is 6.00 m/s. (a) Calculate the change (APE = PEf- PEO) in the gravitational potential energy. (b) How much has the vertical height of the skater changed? Is the skater above or below the starting point? O above the starting point O below the starting point Additional Materials eBook

A 54.0-kg skateboarder starts out with a speed of 1.70 m/s. He does +80.0 J of work on himself by pushing with his feet against the ground. In addition, friction does -265 J of work on him. In both cases, the forces doing the work are nonconservative. The final speed of the skateboarder is 6.00 m/s. (a) Calculate the change (APE = PEf- PEO) in the gravitational potential energy. (b) How much has the vertical height of the skater changed? Is the skater above or below the starting point? O above the starting point O below the starting point Additional Materials eBook

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Description: A 54.0-kg skateboarder starts out with a speed of 1.70 m/s. He does +80.0 J of work on himself by pushing with his feetagainst the ground. In addition, friction does -265 J of work on him. In both cases, the forces doing the work arenonconservative.

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter6: Energy Of A System

Section: Chapter Questions

Problem 1CQ

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