Askier on a hill has 4000j of kinetic energy and 3000j of potential energy. after sliding down the
hill a ways, their potential energy is 2000j.

a) since they slid "down" the hill, what do you expect for change in potential energy (greater or
less)? why?

b) assuming that there is no loss due to friction, what would be the kinetic energy at the second
position? (use ebefore = eafter and show all steps)

c) since there's always "some" friction loss, would the "actual" kinetic energy be less or more than
your answer in b)?