ABSTRACT
At the end of this chapter you should be able to:
• understand dynamic or sliding friction • appreciate factors which affect the size and direction of frictional forces • define coefficient of friction, μ • perform calculations involving F = μN • state practical applications of friction • state advantages and disadvantages of frictional forces • understand friction on an inclined plane • perform calculations on friction on an inclined plane • calculate the efficiency of a screw jack
surfaces in contact, called the normal force; thus, if the weight of a block of wood is doubled, the frictional force is doubled when it is sliding on the same surface.
