Give three examples to illustrate that friction is a necessary evil.
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Solution
Three examples to illustrate that friction is a necessary evil are as follows:
Vehicles' tyres wear out due to friction, but without the friction, a vehicle won't be able to move on a road.
Our shoes' wear soles wear out from walking and running due to the friction offered by the ground, but without the friction, we won't be able to run and walk.
The machine parts in a machine wear out and get damaged because of friction, but without the friction between machine parts, the machine won't produce its desired output.