- #1
chaishreen
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Homework Statement
What happens to the gravitational field strength's magnitude if
a) r decreases by a factor of 4?
b) r increases by factor of 2
Homework Equations
i'm not sure which equation they are referring to? it may be g ∝ 1/r^2
The Attempt at a Solution
I tried to do this:
1/ (r-4)^2 and i got 1/(r^2 - 8r + 16)
the answer at the back of the book for a) says gravitational field strength's magnitude is supposed to become 16 times greater and for b) it's supposed to become 1/4 as great
please help