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Ilia_Sergeevich [38]
4 years ago
7

A uniform plank of length 4.4m and weight 228N

Physics
1 answer:
lina2011 [118]4 years ago
4 0

Answer:0.558 m

Explanation:

Given

weight of Plank=228 N

weight of man=449 N

Length of plank=4.4 m

let R_a and R_b be the reactions at A & B

and Reaction at A becomes zero when plank is about to rotate at B

Taking moment about B at that instant so that plank is just about to rotate.

228\times 1.1=449\times x

Where x is the maximum distance that man can walk

x=0.558 m

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