Question

Problema 24 DAU COROANA!!!

Answer 1

Răspuns:

Ff = m*a --> μN  = m*a --> μ*m*g = m*a --> μ = a/g

v = a*t --> a = v/t

μ = $\frac{v/t}{g\\}$

μ = (10/40)/10 -- > μ = 0,025

Ff = μ*m*g = $\frac{v/t}{g\\} * m*g$ = $\frac{v*m}{t}$

Ff = 15N

Explicație: