A child of mass 21.7 kg takes a ride on an irregularly curved slide of height 747 m, as in
the figure below. The child starts from rest at
The acceleration of gravity is 9.8 m/s2
the top
10.0 points
ned playground slide begins
section and ends with a circu-
in the figure below,
h
W = mg
-3.9 m
If a frictional force acts on the child, what
is the magnitude of the mechanical energy
dissipated by this force, if the speed of the
child at the bottom is 9.2 m/s!
Answer in units of J.