HW help requested (Tension, Circular motion, Work and Energy Theorum)

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SUMMARY

The discussion focuses on solving physics problems related to tension, circular motion, and the Work and Energy Theorem. The user presents their attempts at problems 1-3 and specifically seeks assistance with part A of problem 4, which involves calculating work done using the integral of a force function F(x) = 15000 + 10000x - 25000x². The calculated work done is -9572 Joules, leading the user to question the validity of their approach due to the negative result. The forum participants are encouraged to provide guidance on the correct methodology for solving these types of problems.

PREREQUISITES
  • Understanding of the Work and Energy Theorem
  • Knowledge of integral calculus
  • Familiarity with force functions in physics
  • Basic concepts of tension and circular motion
NEXT STEPS
  • Review the principles of the Work and Energy Theorem in physics
  • Study integral calculus techniques for solving physics problems
  • Learn how to analyze force functions and their implications on work done
  • Explore common pitfalls in physics problem-solving, particularly with negative results
USEFUL FOR

Students studying physics, particularly those tackling problems involving tension, circular motion, and energy concepts. This discussion is beneficial for anyone seeking to improve their problem-solving skills in physics and calculus.

Burnenator
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I have attempted each problem, but am getting lost on just what to do to solve. If i could be pointed in the right direction on how i should go about each problem that would be nice. Attached are my attempts at problems 1-3.

Homework Statement


SEE ATTACHMENT

The Attempt at a Solution


See attatchments for attempts at first 3

attempt at problem 4

M = .150kg D = .65 m
F(x) = 15000 + 10000x -25000X^2
A) work done = ∫F(x)dx = ∫15000 + 10000x -25000X^2 dx
= 15000x + 5000x^2 - ((25000x^3)/3) bounded from 0 to 65 = -9572 JoulesI only need help with part A for problem 4. I feel like i had to have done something wrong or i approuched the problem wrong because a negative answer doesn't seem to make sense.
 

Attachments

  • Problem Assignment 2.pdf
    Problem Assignment 2.pdf
    57.8 KB · Views: 388
  • Attempt at Problem 2.jpg
    Attempt at Problem 2.jpg
    18.1 KB · Views: 426
  • Attempt at Problem 3.jpg
    Attempt at Problem 3.jpg
    15.1 KB · Views: 427
Last edited:
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