The coefficient of friction can be greater than 1.lola2000 said:Homework Statement
A student measures the the force required topull a box along the floor and then the force required to lift the box onto a table. Which is greater?
Homework Equations
The Attempt at a Solution
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Is it the force to lift the box since frictional force is the normal force or weight times the coefficient of friction which is between 0 and 1?
Is there a reference saying that the coefficient of kinetic friction can be greater than 1?SammyS said:The coefficient of friction can be greater than 1.
It is highly unusual even for static friction.Chestermiller said:Is there a reference saying that the coefficient of kinetic friction can be greater than 1?
Chet
Thanks. Very interesting. I'll file this away in my brain.SammyS said:It is highly unusual even for static friction.
I have seen a few values listed with μk > 1 .
Al on Al showed 1.3 & 1.4 in a couple of tables.
Lead on steel in one or two tables -- I don't recall the value.
I don't why intrinsically that it's not possible for μk > 1 , but I don't have any good references.
Forces are caused by the interaction between two objects, such as pushing, pulling, or gravity. Friction is caused by the resistance between two surfaces when they slide against each other.
The strength of a force is typically measured in Newtons (N) using a spring scale or force meter. One Newton is equal to the force required to accelerate a 1 kilogram mass at a rate of 1 meter per second squared.
It depends on the specific situation. Forces can vary in strength and direction, while friction is always present when two surfaces are in contact. In some cases, forces may be greater than friction, while in others, friction may be greater than forces.
Friction can slow down or stop the motion of an object. It acts in the opposite direction of an object's motion, creating resistance that must be overcome by a force in order for the object to continue moving.
Examples of forces include pushing a shopping cart, throwing a ball, and pulling a door open. Examples of friction include walking on the ground, rubbing your hands together, and using a pencil to write on paper.