Why do machines waste energy?

Answer 1

because they were designed to do minimal work not the overload of thing s you do it with it's like when someone ages they lose memories or get sick. machines get old and lose parts or the parts brake the only thing you can do is deal with it

Answer 2

All machines, even the most simple designs, are subject to the friction forces that exist between two moving objects and the Laws of Thermodynamics.

The First Law of Thermodynamics states that 'Energy can neither be created nor destroyed, only changed in form". In effect, a machine is the device that changes the form of energy to perform work.

For example, a gasoline engine utilizes chemical energy from the combustion of gasoline and transforms that energy to mechanical energy to produce work that turns the crankshaft, transmission gears, driveshaft, tires, and then to the road to make a vehicle travel forward.

The amount of energy that is released by the combustion of gasoline is greater than that used to make the vehicle travel forward. This loss of energy transfer is realized due to the friction of the parts in the engine, the gears of the transmission, and the tires with the road.

Methods are used to reduce this energy transfer loss. Lubricants such as engine oil, transmission oil, tight tolerances between the piston rings and engine block, etcetera are all designed to reduce friction forces. Unfortunately, science has not yet found a way to completely eliminate these losses.

However, one example of a virtually frictionless machine is a MAGLEV train. MAGLEV is an acronym for Magnetic Levitation. These trains use magnets to levitate the train from the track and propel the train forward. These trains, popular in Europe, are able to move very fast for little relative energy spent because there are no moving parts experiencing friction losses with the track.

In summary, any machine that has parts that contact one another can never perfectly transfer and transform energy because friction forces will take some of that energy and transform it into heat energy, and be lost because that heat is not used to perform work.

Answer 3

Assuming you mean simple machines, then no. They simply change the direction of the force or the distance over which you need to apply force.

Answer 4

Because machines allow force to be applied over a greater distance.

Answer 5

Apparently ''people'' don't have a reason. They just don't realise it!

Answer 6

Some energy is always lost in overcoming friction which converts part of the input energy into non-productive forms such as heat or sound.

Answer 7

Whatever it is, is correct.