Homework Help Forum: Physics

Posted by Anonymous on Saturday, October 31, 2009 at 3:32pm.

7) Find the force of gravity between two 74.0 kg physics students that are sitting 0.85 m apart 7579.24 N 5.057 x 10(-7) N None of these choices are correct 9.8 x 10(-7) N I'm unsure of how to begin.

• Physics - Anonymous, Saturday, October 31, 2009 at 4:37pm

  F= m1m2/d^2 F= 74*74/(0.85)^2 F= 5476/0.7225 F= 7579.24 N

  
  

• Physics - drwls, Saturday, October 31, 2009 at 5:56pm

  You left out the universal constant of gravity, G, which is a very small number. Look it up and apply it. F= G*m1*m2/d^2

  
  

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