Asked by KS

A 60.8-kg skateboarder starts out with a speed of 1.84 m/s. He does 90.8 J of work on himself by pushing with his feet against the ground. In addition, friction does -278 J of work on him. In both cases, the forces doing the work are non-conservative. The final speed of the skateboarder is 8.12 m/s. (a) Calculate the change (PEf - PE0) in the gravitational potential energy. (b) How much has the vertical height of the skater changed? Give the absolute value.

I have calculated the PE and found it to be -2088.69J. However, I am stuck on trying to solve part b. Please help!
Answered by Damon
http://www.jiskha.com/display.cgi?id=1429748458
Answered by Damon
well we agree on part a and part b is easy
There are no AI answers yet. The ability to request AI answers is coming soon!