Question

Write the advantages and disadvantages of friction by giving suitable examples from sports.

Answer 1

Advantages of Friction are:

1. Due to friction, the object can be placed at position and shape.
2. Frictional force helps to move the object. It helps in running, walking and jumping.
3. Frictional force helps to move the object with high speed. For Example: Spikes are used by athletes to run fast, studs are used in soccer.
4. With the help of friction, the ridges of the skin of our fingers and our palm enable us to grab and hold the object. For Example: In badminton, the players use grip to hold the racket.
5. The energy lost due to friction in trying to move the object is turned into heat energy.

Disadvantages of Friction are:

1. The objects incur wear and tear as a result of friction. To make the part move easily and to stop wear and tear, lubrication is utilised.
2. Friction makes it more difficult when one has to move the object. Friction makes it difficult to slide a box across the floor.
3. In roller skating, rolling shoes and smooth surface are used to minimize friction.
4. Excess of friction means extra energy thus energy is wasted.