Question about work energy theorem

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SUMMARY

The discussion centers on the work-energy theorem, specifically addressing how to determine maximum speed at an angle of 120 degrees without employing vector integration. The participant acknowledges that the work becomes negative beyond this angle and seeks a simpler method to calculate maximum speed. A suggestion is made to consider the integral of a constant force vector, indicating that this approach may simplify the problem significantly.

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Clara Chung
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Homework Statement


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Homework Equations

The Attempt at a Solution


I don't know how to do part 5, I know the point of maximum speed is at an angle of 120 degrees because the work starts to be negative, but how do I find of the maximum speed at that point without using vector integration? (I tried to integrate from theta = 0 to 2 pi /3 but I think it is a bit complicated for a 4 marks question.)
 

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Clara Chung said:
how do I find of the maximum speed at that point without using vector integration
Nevertheless, if you write the integral and bear in mind that ##\vec F## is constant you may find it is quite easy.
 
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