Determining Coefficient of Kinetic Friction (mew)

[benm224]

Homework Statement

A box slides down a 31 degree ramp with an acceleration of 1.42 m/s squared. determine the coefficient of kinetic friction (mew) between the box and the ramp.

Homework Equations

F=ma Fnet=ma Fn(µ)=Ff

The Attempt at a Solution

Many attempts on paper but unable to show on this.

 

[PhanthomJay]

Please show one of your attempts so we may better assist. You need to draw a FBD of the box identifying the weight, normal, and friction forces acting on it,,,,,,,look up 'inclined planes'...and for simplicity choose the x-axis as parallel to the plane and the y-axis as perpendicular to the plane..and Apply Newton's laws in the x and y directions.