Acceleration on a ramp with coefficient of friction

[reganw]

What is the acceleration of a 25kg block sliding down a ramp at 30 degrees to the horizontal, if the coefficient of friction is 0.3?

ans= 2.4m/s²


I haven't done this in a while.. I can't remember how to apply the coefficient of friction..

Thank you!

PLEASE DISREGARD.. I've figured it out now

 

[Berko]

Did you make a free body diagram? Choose your axes along the incline and perpendicular to it. The forced perpendicular must balance.

The force of friction = the coefficient of friction times the normal force.

 

[reganw]

Did you make a free body diagram? Choose your axes along the incline and perpendicular to it. The forced perpendicular must balance.

The force of friction = the coefficient of friction times the normal force.

I did make the free body diagram.. but I get to the end and find the acceleration and still haven't applied the coefficient of friction because I haven't used the equation for Force of friction..

 

[reganw]

Nevermind, I've figured it out now.. thank you