2 ms·
If you're not observing the outside world, then the reference frames "at rest" and "moving at a constant speed" are indistinguishable. Climbing a staircase req
by p1mrx 4y ago
If you're not observing the outside world, then the reference frames "at rest" and "moving at a constant speed" are indistinguishable.
Climbing a staircase requires the same amount of work as climbing a down-escalator. The escalator "wants" to accelerate when you do work on it, but instead this work gets dumped into the braking mechanism, in order to maintain a constant speed.
- whatshisface 4y agoThat is a good one. To offer another explanation, one that doesn't involve changing reference frames, note that the step moves down as your foot pushes down on it, which by definition means work is being done.