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12-04-2024
Physics

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A 51. 3-kg skateboarder starts with a speed of 2. 26 m/s. He does 114 J of work on himself by pushing with his feet against the ground. In addition, friction does −244 J of work on him. In both cases, the forces doing the work are nonconservative. The final speed of the skateboarder is 8. 83 m/s.
(a) Calculate the change (PE f −PE 0) in the gravitational potential energy.
(b) How much has the vertical height of the skater changed?
Give the absolute value.
(a) Number of Units
(b) Number Units

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