PCS 181 Lecture 5: week 5

a force P pulls on a crate of mass (m) that is in contact with arough surface. W represents the weight of the crate. FN representsthe normal force on the crate, and f represents the frictionalforce.

P= 160 N
f= 80 N
w= 196 N
60 degree angle

a) calculate the net force on the crate in the horizontalarea

B) what is the accerelation of the crate along the surface?

FN +mg +fk +F=0

FN is the normal force,mg is mass and gravitational acceleration which equals toweight, and F is force. Sowhat is fk? Blah I can't believe I don't know this.