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Could someone help w 47

Could someone help w 47-example-1

1 Answer

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Let's write the equation


F=(p_1-p_2)/(r)

plugging the known values:


p_1=100,\ p_2=0,\ F=5

So, the equation becomes


5 = (100-0)/(r) \iff 5 = (100)/(r)

To solve for
r, Let's multiply both sides by r:


5r = 100

And divide both sides by 5:


r = (100)/(5)=20

As for the table below, this is the equation solved for each variable: depending on what you need, use the appropriate formula, and plug the known values for the other variables:

First row: solving for
r

Start from


F=(p_1-p_2)/(r)

Multiply both sides by r and divide both sides by F:


r=(p_1-p_2)/(F)

Second row: solving for
F

This is the form we are already given:


F=(p_1-p_2)/(r)

Third row: solving for
p_1

Start from


F=(p_1-p_2)/(r)

Multiply both sides by r:


rF=p_1-p_2

Add
p_2 to both sides:


rF+p_2=p_1

Fourth row: solving for
p_2

Start from


F=(p_1-p_2)/(r)

Multiply both sides by r:


rF=p_1-p_2

Subtract
p_1 from both sides:


rF-p_1=-p_2

Change sign to both sides:


p_1-rF=p_2

User Doorstuck
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