Answer to Question #107543 in Mechanics | Relativity for Bre

Question

If mass is provided in the prompt, but not the normal force, how can you still properly solve for the friction force?

Answer 1

We can find normal force from 2^nd Newton's law.

$$ma=F_{net}$$

For example, if we have only weight, friction and normsl force acting on the body:

$$N=W=mg$$

$$F_f=\mu N=\mu m g$$