What is a disadvantage of friction?
It causes wear and tear of materials
Friction is the force that opposes relative motion between two surfaces in contact.
While friction is useful for walking, gripping and braking, it also has several disadvantages.
A major disadvantage is that friction causes wear and tear of materials, because the rubbing of surfaces slowly erodes them.
'It increases speed' is wrong; friction actually opposes motion and tends to reduce speed.
'It improves machinery efficiency' is incorrect, because friction produces heat and energy loss, which lowers the efficiency of machines.
'It prevents objects from wearing out' is the opposite of the truth, since friction is a cause of wearing out.
Therefore, a clear disadvantage of friction is that it causes wear and tear of materials.
Similar Questions
Which of the following statement is correct regarding force?
I. If an unbalanced force is applied on the object, there will be a change either in its speed or in the direction of its motion.
II. To accelerate the motion of an object, a balanced force is required.
Important Questions from Forces
Which of the following physical quantity is responsible for opening the lid of a bottle?
The use of lubricants makes the surface-
If a box of mass 25 kg is pushed 15 m by a force of ‘F’ N and work done in the process is 480 J. Find F:
If an object moves in a circular path with uniform ________, its motion is called uniform circular motion
Which of the following is an example of contact force?
