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anyone2562
17.02.2021 •
Physics
A force AB of length 100m and weight 600N has its centre of gravity 4.0 m from the end, and lies on horizontal ground calculate the force required to begin to lift the end
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Ответ:
F = 24 N
Explanation:
In this exercise we have a bar l = 100 m with a center of gravity x = 4 m, which force is needed to lift it from the other end
Let's use the rotational equilibrium relationship, where we consider the counterclockwise rotations as positive and fix the reference system at the point closest to the center of gravity
∑ τ = 0
F l -x W = 0
F =![\frac{x}{l} \ W](/tpl/images/1123/4210/2fd0c.png)
let's calculate
F =
4/100 600
F = 24 N
Ответ:
Wow that is tough. Go hide lol