Question

What is the maximum frictional force in the knee joint of a person who supports 66.0 kg of her mass on that knee?

Answer 1

Answer:

Friction force is 10.025 N

Solution:

As per the question:

Mass, m = 66 kg

Now,

We know that the value of the coefficient of friction for the knee joint fluid,

$\mu = 0.0155$

Now,

The friction force is given by:

$f = \mu N$

N = Normal reaction force = weight = mg

$f = \mu \times m\times g$

$f = 0.0155\times 66.0\times 9.8 = 10.025\ N$