Wear and tear is damage that naturally and inevitably occurs as a result of normal wear or aging. It is used in a legal context for such areas as warranty contracts from manufacturers, which usually stipulate that damage due to wear and tear will not be covered.
Wear and tear is a form of depreciation which is assumed to occur even when an item is used competently and with care and proper maintenance. For example, repeated impacts may cause stress to a hammer's head. In the normal use of a hammer for its designed task, this stress is impossible to prevent, and any attempt to eliminate it would make the hammer useless. At the same time, it is expected that the normal use of a hammer will not break it beyond repair until it has gone through a certain amount of use.
The phenomenon of wear and tear is a good demonstration of the Second Law of Thermodynamics in action - roughly speaking, objects will get messier and more worn down over time (they are said to have higher entropy), unless energy from the outside world is used to fix them.
A company which supports a warranty on a product with the possibility of wear and tear will usually limit the warranty to a period of time where its wear and tear will probably not be enough to impede the use of the product significantly. Other factors such as the willingness of a customer to replace a product through warranty will affect how long the company offers it.
Famous quotes containing the words Wear And Tear, wear and, wear and/or tear:
“You should hurry up ... and acquire the cigar habit. It’s one of the major happinesses. And so much more lasting than love, so much less costly in emotional wear and tear.”
—Aldous Huxley (1894–1963)
“You should hurry up ... and acquire the cigar habit. It’s one of the major happinesses. And so much more lasting than love, so much less costly in emotional wear and tear.”
—Aldous Huxley (1894–1963)
“In all unmerciful actions, the worst of men pay this compliment at least to humanity, as to endeavour to wear as much of the appearance of it, as the case will well let them.”
—Laurence Sterne (1713–1768)
“... a phallocentric culture is more likely to begin its censorship purges with books on pelvic self-examination for women or books containing lyrical paeans to lesbianism than with See Him Tear and Kill Her or similar Mickey-Spillanesque titles.”
—Robin Morgan (b. 1941)