Hi, im in 11th grade and am currently in my first year of physics.(adsbygoogle = window.adsbygoogle || []).push({});

I need to use Coulomb's laws to prove that creating a repulsive force of 110833 newtons would take an impossible amount of energy to generate...but its not really that simple, please read on.

Our teacher recently assigned us a project in which we have to find two physically impossible scenes in movies and analyze how they are physically impossible (using the various equations and such that we learned throughout the year) The analysis need to be mathematical, not merely conceptual (ie, i cant just use the flying scene from crouching tiger hidden dragon and state that human flight is impossible).

For my two scenes, i decided to use 2 scenes from the matrix movies, one of them i am having no problem analyzing, the second one is quite difficult though.

It's the scene in matrix 3 when neo and trinity are flying their ship and they accelerate upwards very fast. I deemed this scene impossible because since the ships levitate the same way antigrav lifters do (by charging air particles and using repulsive forces to thrust upwards) I realized that it would take an impossible amount of energy to generate an electric field that could create a repulsive force that is that huge. I am just having trouble proving this using Coulomb's laws. I was hoping someone could help me.

This is the information i have so far

Ship's approxomate mass: 45,000 Kg (mass of a Boeing 737)

Acceleration: 2.46 m/s at 40 degrees relative to the ground (the ship is rising on a slant, much like how a plane takes off)

Net force on the ship (found by multiplying mass by acceleration): ~110833 N

So basically, i need to use Coulomb's laws to prove that creating an electric field with a repulsive force of 110833 newtons would take an impossible amount of energy to generate...any ideas on how to do that?

So far, i tried using F = [k(q1)(q2)]/r^2 and I got (q1)(q2) = 1.23x10^13 Coulombs (which is a HUGE amount of charge)

BUT... thats assuming that the radius would be 1 meter...i have no idea what to plug in for the radius.

Also, i assumed that q1 and q2 are equal but opposite (therefore 1.23x10^13 is simply q^2) but is this a correct assumption? I'm not even sure what im doing.

I'd like to somehow convert this to Joules or Watts, so that i can compare it to the output of a powerplant, thereby showing how impossible it is (ie "powering this ship would take an amount of energy equivalent to the output of 17 nuclear power plants")

I really have no idea where to go from here. Any help would be greatly appreciated.

Thank you very much for your help.

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# Homework Help: Innacurate movie physics project

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