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Frictional Force
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Frictional Force
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Frictional force
Force that generated when two surfaces are in contact
Direction of frictional force
Always opposes the direction of a moving object
Factors that affect frictional force
Type of surface & mass of object
Type of surface
Smooth surfaces produce small frictional forces
Mass of object
Heavy objects produce large frictional forces
Advantages of frictional force
Produces heat, slows down a moving object and stops it, holds an object, makes an object stay static, sharpens tools
Disadvantages of frictional force
Produces unwanted noise, makes movement difficult, causes the soles of shoes and tyres of vehicles to be worn out
Ways to increase force
Use patterned soles and surfaces, make the surface rougher, use anti-slip mats, use magnesium carbonate chalk powder
Ways to reduce frictional force
Use lubricants, use grease, use rollers and ball bearings, use wax, use boric acid powder
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Frictional Force
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