I am still confused how to know which one to use. I drew the FBD for both problems and now I am staring at the charts trying to figure out why sin was used and why cos was used, in order to know which to use next time..
Homework Statement
The first problem was " A 50 N crate is pulled up a 5m inclined plan by a worker at constant velocity. If the plane is inclined at an angle of 37degrees to the horizontal and there exists a constant frictional force of 10N between the crate and the surface, what is the force...