Question

Any 5 disadvantages of friction....

Answer 1

1.friction cause unnecessary wear and tear of the machinery.

2.Due to friction between the moving parts of a machine heat is produced,which in a wat affects the working as well as the life of a machine.

3.A part of useful energy is dissipated in overcoming the friction.

4. Due to friction, noise is also produced in machines.

5. Due to friction, engines of automobiles consume more fuel which is a money loss.

Answer 2

friction causes wear and tear, so things will have to be replaced
friction causes heat, and thus energy loss.
friction can hurt us, especially when we fall and skid
friction causes things to roll. you drop a toilet roll. it rolls. friction creates a torque making that roll and well. toilet paper everywhere.

i'm out of ideas. maybe you can rehash wear and tear or energy loss >.<

Answer 3

Thnx all of you.

Answer 4

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.
4. Due to friction, noise is also produced in machines.
5. Due to friction, engines of automobiles consume more fuel which is a money loss.

Know more about Friction at http://physics.tutorvista.com/forces/friction.html