Question

An object with a mass of `24 kg` is on a ramp at an incline of `pi/12`. If the object is being pushed up the ramp with a force of `4 N`, what is the minimum coefficient of static friction needed for the object to remain put?

Answer 1

0.0175

Explanation:

angle B= `pi/12`
mass=m=24kg
A=force to keep th object upright `=mgcosB=24*9.81*cos(pi/12)=227.42N`
F=friction=4N
we know,
co-efficient, `mu=F/A`
`=(4N)/(227.42N)`

`=0.0175`