The phrase "are physically incapable of" is correct and usable in written English.
It can be used to describe someone or something that lacks the physical ability to perform a specific action or task.
Example: "Due to their age and health conditions, many elderly individuals are physically incapable of participating in strenuous activities."
Alternatives: "cannot physically" or "lack the physical ability to".
Above 10km, the modified cargo planes that the Hurricane Hunters use are physically incapable of venturing.
It is what biologists call an unfakeable signal, like the deep roar of a big, rutting stag that smaller adolescents are physically incapable of producing.
Depending on the routes taken, a climber faces at least 70 pitches (rope-lengths) with some holds so small that human fingers are physically incapable of grasping them.
With asthma, proper use of a metered-dose inhaler can prevent more than 75percentt of flare-ups, but fewer than half are taught how to use the inhaler correctly and, although their doctors don't realize it, some patients are physically incapable of using the inhaler as intended.
I'm getting Oedipus, I'm getting Hamlet, and I'm getting comic relief in the shape of the unaccountably single Acting DC Gary Best ("champagne gives me wind"); for those of us who are physically incapable of watching televised sport, what more could we reasonably ask?
Given the very different anatomies of the human and chimpanzee larynx, the Gardners suspected that previous experiments had failed because chimps are physically incapable of speech.They therefore decided to try teaching a chimpanzee to sign in the way that deaf people do.
Hospital staff pushed her to do things she was physically incapable of, due to the physical condition they refused to acknowledge she has.
In fact, he's physically incapable of barking.
The self-flummoxing Abdul is physically incapable of not reassuring the contestants.
The rigid suit meant he was physically incapable of turning his head.
Because I was physically incapable of being in more than one classroom during the national anthem, what I observed was hardly definitive.
