59.
REASONING
The toboggan has a constant velocity, so it has no acceleration and
is in equilibrium.
Therefore, the forces acting on the toboggan must balance, that is,
the net force acting on the toboggan must be zero.
There are three forces present,
the kinetic frictional force, the normal force from the inclined surface, and the
weight
mg
of the toboggan.
Using Newton’s second law with the acceleration equal
to zero, we will obtain the kinetic friction coefficient.
SOLUTION
In drawing the freebody
diagram for the toboggan we choose the +
x
axis to be parallel to the hill surface and
downward,
the
+
y
direction
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This note was uploaded on 01/29/2010 for the course CALC 01:640:135 taught by Professor Soffer during the Spring '08 term at Rutgers.
 Spring '08
 SOFFER

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