find the weight of a 100 kg rugby player using both forms of the equation...
kk...so i got the equation...but when i do the calculation...i dunt get 980N....wth is wrong?
Fg=(Gm1m2)/r^2
Fg=(6.67X10^-11Nm^2/kg^2(5.98X10^24kg)(100kg))/(6.38X10^6m)^2
the anwers is suppose to be 980...but i get a way bigger answer...help?
2007-02-17 12:20:31 · 4 answers · asked by no name 1 in Science & Mathematics ➔ Physics
If you are doing it using the law of gravitation I would make sure that you have the proper units on all of your numbers.
F = GMm/r^2
G= 6.67 x 10^-11 Nm^2/kg^2
M = 5.97 x 10^24 kg
r = 6.38 x 10^6 m
m = 100 kg
I obtain the answer 978 N, using these numbers.
2007-02-17 12:36:28 · answer #1 · answered by msi_cord 7 · 0⤊ 0⤋
You are using the wrong eqn: When your calculating N imposed by a mass, the eqn is f = ma = 9.81 * 100 kg = 981 N.
The units of a newton, N = acceleration x kilograms!
2007-02-17 20:32:45 · answer #2 · answered by DuckyWucky 3 · 0⤊ 0⤋
You have stated the formula rightly. And the answer is surely coming out to be 978N.
I think you are taking some value worng.
M;-6*10^24 kg
r;-6.4*10^6 m
2007-02-18 01:26:28 · answer #3 · answered by Tariq M 3 · 0⤊ 0⤋
i got 978.27N.
i don't know what you did wrong. Maybe you should try again.
2007-02-17 20:26:16 · answer #4 · answered by 7 · 0⤊ 0⤋