Question

A 56kg climber is supported in
the 'chimney' by the friction
forces exerted on his shoes and
back as shown in fig. The static
coefficients of friction between
his shoes and the wall, and
between his back and the wall
are 0.80 and 0.60 respectively.
Assume the walls are vertical
and that frictional forces are
maximum. The minimum normal
force (in Newton) he must exerts
is (take g = 10 m/s2)​

Answer 1

Answer:

The static frictional force is at maximum is given as follows:

Here, is the coefficient of static friction and is the normal reaction force.

The free body diagram of the climber is shown below.