perpetual motion

USAGE SUMMARY

"perpetual motion" is correct and usable in written English.
It is often used to describe machines and processes that could operate indefinitely without additional energy. For example, "The perpetual motion machine would be a scientific breakthrough, as it could produce its own energy."

✓ Grammatically correct

News & Media

Science

Arts

Sports

Human-verified examples from authoritative sources

Exact Expressions

50 human-written examples

"This guy is perpetual motion.

Independent

He was the ultimate in perpetual motion.

The New York Times - Sports

The tight end is in perpetual motion.

The New York Times - Sports

It becomes a perpetual motion machine".

The New York Times - Style

This is modernism in perpetual motion.

The New York Times

THE DREAM OF PERPETUAL MOTION, by Dexter Palmer (Picador, $16).

The New York Times - Books

Human-verified similar examples from authoritative sources

Similar Expressions

10 human-written examples

The documentary follows the perpetual-motion Amatos.

The New York Times - Arts

"And please don't call it a perpetual-motion machine".

The New York Times

His pieces were fascinating, introspective perpetual-motion meditations.

The New York Times - Arts

Basically, there are three kinds of perpetual-motion devices.

Encyclopedia Britannica

Congo Soukous is the perpetual-motion machine of African pop.

The New York Times

Expert writing Tips

Best practice

When using "perpetual motion" metaphorically, ensure the context clearly indicates the non-literal meaning to avoid confusion with the scientific concept.

Common error

Avoid presenting "perpetual motion" as a realistic possibility in scientific contexts unless you're specifically discussing theoretical concepts that challenge established laws of thermodynamics. Be aware that according to Ludwig, perpetual motion machines are a myth.

Linguistic Context

The phrase "perpetual motion" primarily functions as a noun, often used to describe a theoretical concept in physics. However, it's also employed adjectivally to characterize something as constantly moving or endlessly active. Ludwig examples show both scientific and metaphorical uses.

Expression frequency: Very common

Frequent in

News & Media

54%

Science

20%

Arts

10%

Less common in

Wiki

4%

Encyclopedias

2%

Formal & Business

2%

Ludwig's WRAP-UP

In summary, "perpetual motion" is a grammatically correct noun phrase with both literal and figurative applications. While scientifically referring to an impossible self-sustaining motion, it's often used metaphorically to describe something constantly in action. With a high frequency of use, particularly in News & Media, understanding its appropriate context is essential. Ludwig AI confirms its correctness. The best practice is to ensure clarity when used metaphorically, avoiding confusion with the scientific concept. Common errors include misinterpreting it as scientifically achievable, which Ludwig AI considers a myth.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

never-ending movement

Simply stresses the lack of conclusion to the movement.

continuous process

Highlights that the process occurs without interruption.

constant flow

Suggests a steady and unbroken stream or movement.

unending cycle

Focuses on the cyclical nature of the process rather than its continuous movement.

non-stop operation

Describes the operational aspect of something working continuously.

ceaseless activity

Emphasizes the lack of pauses or breaks in the activity.

eternal rotation

Highlights something that spins forever.

sustained momentum

Focuses on keeping something moving forward.

relentless drive

Implies a forceful and persistent effort.

uninterrupted sequence

Emphasizes that actions proceed without being broken or halted.

FAQs

How is "perpetual motion" used in a sentence?

"Perpetual motion" can describe a hypothetical machine that runs forever without energy input or, metaphorically, something that seems to operate endlessly. For instance, "The politician seemed to be in "perpetual motion" during the campaign, attending every event possible."

What does "perpetual motion" literally mean?

Literally, "perpetual motion" refers to the motion of a hypothetical device that continues indefinitely without any energy input. Such devices violate the laws of thermodynamics and are not considered possible in the real world.

What are some common misconceptions about "perpetual motion"?

A common misconception is believing that "perpetual motion" machines are feasible. They are often confused with highly efficient machines that minimize energy loss, but these still require energy input to function.

Is "perpetual motion" always used in a scientific context?

No, "perpetual motion" is often used metaphorically to describe someone or something that appears to be constantly active or in a state of never-ending activity. For example, "She's a "perpetual motion" machine at work, always juggling multiple projects."