contestada

Suppose the coefficient of static friction between a quarter and the back wall of a rocket car is 0.330. At what minimum rate would the car have to accelerate so that a quarter placed on the back wall would remain in place?

Respuesta :

Answer:[tex]3.23 m/s^2[/tex]

Explanation:

Given

[tex]\mu_s =0.330[/tex]

Frictional Force is balanced by force due to car acceleration

Frictional force [tex]F_s[/tex]

[tex]F_s=ma_{min}[/tex]

[tex]\mu_sN=ma_{min}[/tex]

[tex]\mu_s\cdot mg=ma_{min}[/tex]

[tex]a_{min}=\mu_s \cdot g=0.330\times 9.8=3.23 m/s^2[/tex]