Hint: Pay attention to the units of measure. You may have to convert from feet t

Question

Hint: Pay attention to the units of measure. You may have to convert from feet to miles several times in this assignment. You can use 1 mile = 5,280 feet for your conversions.

1. Many people know that the weight of an object varies on different planets, but did you know that the weight of an object on Earth also varies according to the elevation of the object? In particular, the weight of an object follows this equation: , where C is a constant, and r is the distance that the object is from the center of Earth.

a. Solve the equation for r.

Explanation / Answer

w= Cr-2

multiply both sides by r2 first...

wr2 = C*(1)

take note that the r2*r-2 simply equals "1"...

now divide both sides by "w" to get r2 alone...

r2= C/w

now square root both sides to solve for "r"

r= (C/W)             (that little symbol is a square root sign. The inside is C divided by w)

Hope this helps!!!

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