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Is Using a Stair Machine the Same as Climbing Stairs?

Spluk.ph by Spluk.ph
May 31, 2025
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Is Using a Stair Machine the Same as Climbing Stairs?
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Because the change in kinetic power remains to be zero, which means that the constructive change in gravitational potential power is the same as the unfavourable of the change in inside power. For instance you’ve gotten a mass of 75 kilograms (165 kilos). Which means transferring up 1 meter would scale back your inside power by 735 joules. That is referred to as figuring out.

Climbing Stairs vs. a Stair Climber

Now we are able to return to the unique query: What does the work-energy precept say about stairs versus a stair-climbing machine? Effectively, we already did the physics of stair climbing. It is the identical calculation when you get on prime 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 underneath you. If somebody is measuring your ahead movement, they’d say your pace is zero. Your top additionally does not change, so now the work-energy equation appears to be like like this:

Image may contain Text

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

The truth is, if the escalator had partitions and a ceiling, you would not give you the option 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 some other reference body—the essential legal guidelines of physics stay the identical. So, from the attitude of the escalator body you are transferring up and doing work. It is the identical as when you had been strolling up a stationary body.

However Really, the Stair Climber Is Tougher

I stated that the stair climber and climbing stairs had been the identical—however they don’t seem to be. The truth is, 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 discipline (g) is rarely actually fixed.

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



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