does anyone know now to solve this physics problem? please help?

  • Thread starter Thread starter Elizabeth
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Elizabeth

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A 57.5 kg skateboarder starts out with a speed of 1.85 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 (ΔPE = PEf - PE0) in the gravitational potential energy.
_____ J
 
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