Answers created by Md H S Shohrawardy

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• If a 600-N woman sits on the floor, how much force does the floor exert on her?
  
• A charge of `-2 C` is at `(3, -7 )` and a charge of `1 C` is at `(-3 , 4 )`. If both coordinates are in meters, what is the force between the charges?
  
• How much work does it take to raise a `3 kg` weight `81 m`?
  
• A projectile is shot at an angle of `pi/3` and a velocity of `5 m/s`. How far away will the projectile land?
  
• What is the kinetic energy of a `16 kg` object moving at `4/3 m/s`?
  
• What is the dot product of `<-2,5,-7>` and `<8,-3,1>`?
  
• Question #7574f
  
• What is `|| <4, 9, 7 > - < 9, -1, 2> ||`?
  
• If an object is dropped, how fast will it be moving after falling `12 m`?
  
• A ball with a mass of `9 kg` moving at `14 m/s` hits a still ball with a mass of `18 kg`. If the first ball stops moving, how fast is the second ball moving?