Shannonvi said:Homework Statement
A 55.0-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.300. A force of 156 N is applied to the box directed at an angle of 18.0 above the horizontal. Does the box move?
Please help??The Attempt at a Solution
156 (cos18)= .300 (55kg×9.81m/s)
148.36N = 161.865 so no, the box wouldn't move. but my answer is wrong[/B]
PeroK said:Does the force of 156N do anything else?
Shannonvi said:I'm not sure what you mean
Static friction is a type of force that prevents two surfaces from sliding against each other when they are not in motion.
Static friction occurs when two surfaces are at rest, while kinetic friction occurs when two surfaces are in motion.
The amount of static friction depends on the type of surfaces, the roughness of the surfaces, and the force pressing the surfaces together.
The formula for calculating static friction is Fs = μsN, where Fs is the force of static friction, μs is the coefficient of static friction, and N is the normal force between the two surfaces.
Static friction is important because it allows us to walk without slipping, drive a car without skidding, and enables objects to stay in place on a surface without sliding.