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

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 * m* g`

`f = 0.0155* 66.0* 9.8 = 10.025\ N`