Students will take notes on each lecture. Each lecture will be followed by a laboratory experiment relevant to the lecture. Students will present their projects at the science fair. Each write-up will receive a grade Experimental work product will be evaluated for accuracy, thoughtfulness and effort. Reason - Friction the force that acts when two objects rub together or slide over one another.
Friction keeps objects from moving .
In the above example the friction between the soles of shoes and ice is less than the shoe soles and the ground. Smooth surfaces make less friction than rough surfaces . It takes more force to move an object over a rough surface than a smooth surface. This may be demonstrated with a ten pound plate, string, and a towel. Friction can be useful, for example people used it to make fires.