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Is Using a Stair Machine the Same as Climbing Stairs?

The Owner Press by The Owner Press
May 31, 2025
in Business News
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Because the change in kinetic power remains to be zero, which means the optimistic change in gravitational potential power is the same as the unfavorable of the change in inner power. As an example you will have a mass of 75 kilograms (165 kilos). Which means transferring up 1 meter would scale back your inner power by 735 joules. That is known as understanding.

Climbing Stairs vs. a Stair Climber

Now we will return to the unique query: What does the work-energy precept say about stairs versus a stair-climbing machine? Properly, we already did the physics of stair climbing. It is the identical calculation for those who get on high of a 1 meter desk or climb 100 tales—it is only a totally different worth for the peak. However suppose you keep in the identical place whereas the steps transfer beneath you. If somebody is measuring your ahead movement, they’d say your velocity is zero. Your peak additionally does not change, so now the work-energy equation appears like this:

Image may contain Text

This says the change in inner power can be zero, which suggests you do not burn any energy. I imply, that may’t be proper … proper? Then how can we repair this? I will use a pleasant instance based mostly on this video from Steve Mould. It goes like this: Think about you might be climbing up a downward-moving escalator. Once more, an observer on the bottom would see you as stationary. Nonetheless, we might additionally measure your velocity from the reference body of the escalator, and you’ll be transferring up.

Actually, if the escalator had partitions and a ceiling, you would not have the opportunity inform that you just had been staying in place. You would not even know the steps are transferring. Because the stairs are transferring at a continuing velocity (zero acceleration), this might be an inertial reference body. In physics, any inertial reference body is as legitimate as every other reference body—the fundamental legal guidelines of physics stay the identical. So, from the angle of the escalator body you are transferring up and doing work. It is the identical as for those who had been strolling up a stationary body.

However Really, the Stair Climber Is More durable

I mentioned that the stair climber and climbing stairs had been the identical—however they don’t seem to be. Actually, climbing up 100 tales is less complicated than the equal distance on a stair climber. Does that appear loopy? It’s a little loopy. The rationale they’re totally different is as a result of the gravitational area (g) is rarely actually fixed.

Keep in mind, we outlined the gravitational potential power as U = m x g x y? That is not likely flawed, however it’s a little deceptive. Really, the gravitational potential power for the Earth-person system can be outlined as the next:



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