How hard to push someone on the far right of the Board to lift the slab?
A slab weighs 1000 Newtons. The segment of the Board pivot to the right is 5 times the number of meetings of the Board to the left of the pivot. Assuming that the Board is very light, how hard we push the person down on the far right of the Board to lift the slab?
Assuming the slab is at the far left, then the person has to push: 1 / 5 * 1000 = 200 newtons to lift the slab. It is an example of "mechanical advantage", if you need to try it, you can use to find the answer pair (r1) * (Fslab) = (R2) * (Fapplied) R2 = 5R1 Fslab = 5 * (Fapplied) Fapplied = Fslab / 5 Results of the same. Note that the person does not increase the energy of this, if you wanted to the object of a certain amount of potential energy, the Board should be enhanced below 5 times more than if you just lifted the slab directly.
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