Question

Please help me with math!

Answer 1

Answer:

$\frac{F_{f}}{m*g*cos(x)} =u$

Step-by-step explanation:

The statement says the following:

$F_{f}= u*F_{N} \\F_{N}=m*g*Cos(∅)$

We need to find 'u' given that we know the following terms:$F_{f}, F_{N}$, m, g, ∅

The way to do that is to substitute not known expression into known expression,  we will use the expression of $F_{N}$ in $F_{F}$

This leads to

$F_{f}=u*m*g*cos(∅)$

Finally we can obtain 'u' by dividing the whole equation with the terms that are with 'u'

We have this

$\frac{F_{f}}{m*g*cos(x)} =u$

Where 'u' is the variable that you are  looking for