contestada

tired worker pushes with a horizontal force of 357 N on a 142 kg crate initially resting on a thick pile carpet. The coefficients of static and kinetic friction are 0.60 and 0.40, respectively. Find the magnitude of the frictional force exerted by the surface.

Respuesta :

Answer:

Frictional force will be equal to 257 N

Explanation:

We have given mass m = 142 kg

Static frictional coefficient [tex]\mu _s=0.6[/tex] and kinetic coefficient friction [tex]\mu _k=0.4[/tex]

Force applied F = 357 N

Static friction force is given by

[tex]f=\mu _smg=0.6\times 142\times 9.8=834.96N[/tex]

As static friction is greater than the force applied

So body will not move

And friction force will be equal to 257 N