Working Against Gravity

Automatic TRANSCRIPT

But I'm exhausted. I've been breath for the past ten minutes. I'll humble we take a break. Enjoy the view good idea. Dine. But why are we so tired? Anyway, we haven't covered that much distance. I wouldn't be this tired. If we were just walking on level ground like a flat road or sidewalk. So what makes walking uphill so much harder has to do with gravity. Hearst. Gravitational field is always pulling us toward the center of the earth and our feet have to exert an equal and opposite force to keep us upright. That's happening when we're just standing upright or Woking horizontally across a level surface like walking gun a flat street, but when we woke up on incline along with all the effort, we exerting to walk forward also lifting bodies against gravity. That's also the reason why walking up stairs is so much harder than walking downstairs. When we go up we have to work to overcome the force of gravity while we go down the pull of gravity makes it easier for us. So all the work. We're doing when we're climbing hill makes us us more energy, right, right? Which is why we get tired so fast, ten minutes into our high, for example. It's only been ten minutes. We'd better cut our break short and get going or we'll be out here until it gets dark. This

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