Gravitational force between 2 people

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SUMMARY

The gravitational force of attraction between a 60 kg student and an 80 kg student, positioned 1.4 meters apart, can be calculated using Newton's law of universal gravitation. The gravitational constant (G) is 6.67 x 10^-11 Nm²/kg². The correct formula to apply is Fg = G * (m1 * m2) / r². Upon correcting the calculation to use r², the accurate force can be determined.

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  • Basic algebra for manipulating equations
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[SOLVED] Gravitational force between 2 people

OK, this is my first time doing this so I'm completely lost.

Homework Statement


Find the force of attraction between a 60kg student and another student of mass 80kg, 1.4m away.

Homework Equations


G = 6.67 * 10[tex]^-11[/tex] Nm[tex]^2[/tex]/kg[tex]^2[/tex]

Fg = [tex]\frac{Gm_1m_2}{r^2}[/tex]

The Attempt at a Solution


I tried [6.67 * 10^-11 (60kg)(80kg)] / 1.4m

But I'm wrong.

Your help is appreciated.
 
Physics news on Phys.org
r^2, mate; not r.
 
Wow what a mistake.. Thanks a lot!
 

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