Question

Sa se demonstreze ca:
Ff= y×m×g
Daca v=0, v=constant
PS : y este miu

Answer 1

[tex]F_{fr}=\mu\times m\times g\\ \\ F_{fr}=\mu \times N\\ \\ N=G,~dac\breve{a}~corpul~se~afl\breve{a}~pe~orizontal\breve{a}\\ \\ G=m\times g\Rightarrow N=m\times g\Rightarrow F_{fr}=\mu \times m \times g \\ \\[/tex]