Can there be infinite anything?

So the conclusion is: science (that is, physics) cannot establish existence of infinite quantities. There is nothing physically infinite. As such, existence or non-existence of infinite quantities is outside of the scope of science. No (understandable/explainable) physical quantity could be infinite.

Can there be infinite energy?

If you add up all the visible positive energy, the two might just balance. It could only be infinite if the universe is infinite. Which is possible: we see just the ‘visible universe’ where light has had time to reach us. As Quora User says, some calculations would give the universe zero net energy regardless of size.

Why can’t we have infinite energy?

It states that energy cannot repeat in an infinite loop within a closed system, and so we must replenish what is lost. A perpetual motion machine needs no energy input to create new energy, unlike a conventional model such as a car engine, which needs fuel input, or a solar panel, which needs sunlight.

How is gravity infinite?

The gravitational force acts between all objects that have mass. This force always attracts objects together, and although it is the weakest of the four fundamental forces, gravity has an infinite range. This means that if the distance is doubled the gravitational attraction is four times less.

Is perpetual motion possible?

Perpetual motion is the motion of bodies that continues forever in an unperturbed system. A perpetual motion machine is a hypothetical machine that can do work infinitely without an external energy source. This kind of machine is impossible, as it would violate either the first or second law of thermodynamics or both.

Can work be done horizontally?

Work can be done only against (i) gravity or (ii) any other resistence. If there is no resistance in place, then horizontal motion does not amount to work. According to first law of motion, a moving object will keep on moving for ever. There is no need of energy to keep motion going on.