Question

Study about frictional force from every day life .Where is it useful and harmful ? Explain.​

Answer 1

Answer:

Frictional force is useful for walking, running etc.

It sometimes harmful harsh and strong friction cause damage to our skin cause cuts or stichtes..

Hope it will help you

Have a nice day

Answer 2

Answer:

Friction is a necessary evil for everything on Earth. If you look around yourself, you will see friction playing its role. So here are some advantages and disadvantages of this necessary evil, friction.

Advantages of Frictional Force

1. Friction helps you in writing with a pen or a pencil as they won't work on a friction less surface.
2. It is becomes difficult to walk on a slippery road due to low friction. When we move on ice, it becomes difficult to walk due to low friction of ice.
3. We can not fix nail in the wood or wall if there is no friction. it is friction which holds the nail.
4. You can not wear dress, flippers, etc without friction.

Disadvantages of Frictional Force

1. The main disadvantage of friction is that it produces heat in various parts of machines. In this way some useful energy is wasted as heat energy.
2. Due to friction we have to exert more power in machines.
3. It opposes the motion of a body.
4. Friction causes wear and tear of an object, i.e machine parts.