Max Friction Coefficient for 34° Factory Box Slide in 3.2s

[Robertoalva]

1. At the end of a factory production line, boxes start from rest and slide down a 34° ramp 5.4 m long. If the slide is to take no more than 3.2 s, what is the maximum allowed frictional coefficient?

Homework Equations

Ff= μ F

The Attempt at a Solution

Homework Equations

The Attempt at a Solution

 

[Sunil Simha]

Hi Robertoalva,

Could you show where you are stuck in the problem please?

 

[Robertoalva]

I don't know how to use the equation for the frictional coefficient! I suppose that I have to use another equation that uses time, but I'm not so sure!

 

[Sunil Simha]

Well, frictional coefficient is the ratio of the magnitudes of the normal force and maximum frictional force possible.

Knowing that, what would be the acceleration of the block?