Question

How is the heat produced by friction both an advantage and a disadvantage?

Answer 1

1. Friction: It is a contact force that comes into existence when irregularities present on two surfaces get interlocked and oppose the relative motion between the surfaces.
2. Friction cause heat between the surface.

Advantages of heat produced by friction:

1. When we rub our hands vigorously they become warmer due to heat produced by friction.
2. Matchstick lights up when it strikes against the rough surface due to heat produced by the friction.

Disadvantages of heat produced by friction:

1. The heat generated by the friction cause tires burst on roads.
2. Blades of grinder heat up due to friction and can damage the machine parts.