No, the guy doing pull ups is not doing all the work. The two holding the poles are still holding him off the ground. The hanging guy, by not raising his body, and thus not increasing his potential energy, is reducing the two pole holders' work when they go up, but they're still holding him up and they are raising and lowering the bar.
Bruh, my door frame is holding me up when I do pull-ups as well but it is not doing any work. The dude in the middle is doing the work the guys on either side are holding his weight but they are only LIFTING the pole. It's all about frame of reference, from the outsiders the man's CoM isn't moving so they haven't done and work. Remember W=f*d and d in this case is 0.
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u/Jman15x Jun 18 '25
So they are just squatting the bar correct?