Answer to Question #199955 in Classical Mechanics for Claudio

Question

Determine the magnitude and direction of the following forces in a 150N box that lies on a 30 degree inclined plane by whose coeffient of kinetic friction is 0.32

Answer 1

$N=F\cos\alpha=150\cdot 0.87=130~N,$

$F_{fr}=\mu N=0.32\cdot 130=42~N.$