Calculating Work Done by a Varying Force: Positive or Negative?

AI Thread Summary
To calculate the work done by a varying force, one must use the integral of the force over the distance moved. In this case, the force is defined as F=(7Nxm^2)x^-2, and the object moves from x=2 to x=3. The work done can be determined by integrating the force function within these limits. The result of this calculation will indicate whether the work is positive or negative, depending on the direction of the force relative to the displacement. Understanding the relationship between force, distance, and work is crucial for solving this problem.
williams31
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An object of mass 2 kg is repelled from the origin by a force in the +x-direction whose magnitude varies with x according to F=(7Nxm^2)x^-2. How much work is done by this force when the object moves from x=2 to x=3? (Be sure to say whether this work is positive or negative.)


I have no idea how to start this problem off. Anybody want to help me out?
 
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What is the equation that defines how much work is done, in terms of the force and distance through which the force acts? Work is the integral of what quantities?
 
You really should look through the link I gave you on the other thread.
 

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