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Skier coasts down hill speed at bottom?

  • Thread starter araspante
  • Start date
Hello! Just wondering if anyone could point me in the correct direction with these problems?

1. The problem statement, all variables and given/known data
"A skier coasts down a very smooth, 10 m high slope. If the speed of the skier on the top of the slope is 5.0 m/s, what is his speed at the bottom of the slope?"


"If the skier has a mass of 60 kg, and the force of friction retards his motion by doing 2500 J of work, what is his speed at the bottom of the slope?"

I just can't seem to figure out what equation to use to figure this out.

Thanks SO much!


Science Advisor
Homework Helper
welcome to pf.
At the top of the hill the skier has kinetic and potential energy - at the bottom he has just kinetic - since no energy is lost these are equal.
what are the equations for KE and PE?
thank you!

the equations are...

KE= 1/2mv^2
PE= mgy

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