One pound is the same as 4.45 N . Show that 1 N  equals 0.23 lb.

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Borys Shumyatskiy | College Teacher | (Level 3) Associate Educator

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Hello!

This is a sort of proportion, because if a weight in pounds is changed in a certain number of times, then this weight in Newtons is changed in the same number of times.

1 pound = 4.45 N, how many pounds are in 1 N? Denote this quantity as x.

Then

1 pound : 4.45 N = x pounds : 1 N,

or

`1/4.45=x/1.`

By the property of proportions

`x = (1*1)/(4.45) = 1/4.45 approx 0.225 (N).`

Q.E.D.

(actually, 0.22 is more accurate number than 0.23)

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