A uniform ladder of mass 17 kg and length 6 m leans against a smooth wall at an angle
67° with respect to the ground. A person of
mass 58 kg climbs up the ladder to a point
two-thirds of the way to the top. Assume
that there is no friction between the top of
the ladder and the wall.
Compute the minimum coefficient of static
friction between the ladder and the ground
that would prevent the ladder from slipping.
The acceleration of gravity is 9.8 m/s?.