how can u say frictional force dependent on weight of an object
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RHETT ALLAIN09.19.14 8:52 AM
SCIENCE
Friction Isn't Always What You Think It Is
It’s perhaps the second week of your introductory physics course. Your instructor starts talking about friction and writes the following two formulas on the board. Then there is probably some sort of lecture like this: Friction is a contact force when two surfaces interact. The second equation is the kinetic frictional force that is used […]
Is a block on an inclined plane the most boring physics problem ever? Maybe not.
Is a block on an inclined plane the most boring physics problem ever? Maybe not.
IS A BLOCK ON AN INCLINED PLANE THE MOST BORING PHYSICS PROBLEM EVER? MAYBE NOT. RHETT ALLAIN
It's perhaps the second week of your introductory physics course. Your instructor starts talking about friction and writes the following two formulas on the board.
Then there is probably some sort of lecture like this:
Friction is a contact force when two surfaces interact. The second equation is the kinetic frictional force that is used when two surfaces are sliding against each other. The frictional force in this case depends on the two types of materials interacting (described by the coefficient μk) and how hard these two surfaces are pushed together (the normal force). The static friction case is similar for when the two surfaces are stationary relative to each other. In static friction, the frictional force is whatever value it needs to be to prevent sliding up to some maximum value.