Evan's Space

Wonders of Physics

Double Pivots Question

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A man is standing on a uniform plank of mass 20 kg and 6 m long. He is standing 1 m from the string at A.

IMG-0306

a) Find the unknown forces FA and FB.

The man now walks to the left of A.

IMG-0309

b) Determine the maximum distance in which the man can move before the plank topples.

Solutions:

a) Fa = 550 N and FB = 250 N

b) d = 0.67 m

Refer to the video tutorial for the explanation.

Click on this post for the comics on moments concepts

 

 

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