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DedPeter [7]
3 years ago
8

9 b. A sign (including the post and base) weighs 40 pounds and is

Engineering
1 answer:
tigry1 [53]3 years ago
8 0

Answer:

The weight should be added to the base of the sign to keep it from tipping is 65.6 lb

Explanation:

Given data:

A sigh weighs 40 pounds

Suported by an 18 in x 18 in square

Force of the wind 13.2 lb

Questions: Will the sign tip over, if yes, how much evelnly distributed weight should be added to the base of the sign to keep it from tipping, W = ?

The sign and the post have a length of 6 ft. You need to calculate the distance from the edge to the middle point:

18/2 = 9 in = 0.75 ft

Force acting in the base (40 lb):

F=\frac{40*0.75}{6} =5lb

The weight should be added to the base:

(40+W)*\frac{0.75}{6} =13.2\\W=65.6lb

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