"Friction Worksheet - DOC - DOC"
Friction Worksheet Physical Science – Mr. Rita Skeletal Notes – Fill in the blank from the lecture introducing Friction. 1. Friction is a force, but it is a known as an _____________________________ force. It is a force that acts when two surfaces contact each other. Friction acts when two solid surfaces come in contact. Fluid friction acts when one of the surfaces are a ______________ or a __________________. Examples of each type are as follows: Gas fluid friction is known as _________________________________ Liquid fluid friction is known as _______________________________ 2. Friction comes in two types: 1. Static Friction - _____________________________________________ Examples are: ______________________________________________ _______________________________________________ 2. Kinetic Friction - ___________________________________________ Examples are: ______________________________________________ _______________________________________________ Static friction is always __________________ kinetic friction (Think of pushing a car) In order to get _______________ friction, you must overcome ______________ friction. 3. Friction is Fun! Actually the equation to find friction is: F = N F is the Force ________________ to an object. Its units are ________________. is the coefficient of friction. It is a number with ____ units.(more on this later) N is the normal force that acts opposite of gravity. (it’s the same as ___________) 4. This thing called (pronounced as Mew, rhymes with New) is different for every _____ different surfaces. The more that two surfaces stick together, the ________ the . If two surfaces slide easily, there is a __________ . 5. List the following from greatest value of (4) to the smallest (1). ___Two sides of Velcro ___ metal on ice ___wood on wood ___ Human skin on asphalt 6. So if the object is sliding, you get a kinetic or, k . If the object is not moving you get static , or s.