Which May Result from an Increase in Friction?

Friction causes generation of heat and causes increased wear and tear.

What is an increase in friction?

There are two methods of increasing friction: one is by making the surfaces rough and the other by increasing the mass of the object that is moving. For example, the tyres of vehicles have treads (these are the 'designs' that you can see on the tyre surface), which increase the friction between the tyre and the road.

Which of the following is an example of increasing friction?

Which of the following is an example of increasing friction? -waxing skis -adding grease to gears on a bike -throwing sand on an icy driveway -oiling a squeaky door.