Posted by **Bongo** on Friday, February 1, 2008 at 4:17pm.

Calculate the force of gravity between a 2.50 kg newborn baby and a 80.0 kg doctor standing 0.250 m away. G = 6.67 E -11 N*m2/kg2

My work

Fg = (Gm1 Gm2) /d^2

m1=2.50 kg

m2=80.0 kg

d=0.250 m

g=6.67 E -11 N*m2/kg2

Fg = (Gm1 Gm2) /d^2

Fg= g ( 2.50 kg)(80.0 kg)/0.250m^2

Fg= (6.67 E -11 N*m2/kg2)( 2.50 kg)(80.0 kg)/0.250m^2

Fg=

I keep messing up at the end i cant get the right answer. I just needto know how to multiply that last part, im getting confused with the gravity part of it...

- Physics ( just need a lil help multiplying -
**drwls**, Friday, February 1, 2008 at 4:29pm
You have all the numbers correct in the formula, so all you have to do is make the calculation. Having 0.250^2 (which is 1/16) in the denominator is the same as multiplying by 16.

I get 2.13*10^-7 Newtons for the answer. All of the other dimensions cancel (kg and m) out

- Physics ( P.S.) -
**drwls**, Friday, February 1, 2008 at 4:32pm
I had the advantage of using a hand calculator with scientific notation. I'm lazy.

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