Understanding the Work-Energy Theorem

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SUMMARY

The Work-Energy Theorem states that the work done on an object is equal to the change in its kinetic energy. It is defined as the energy transferred when forces between two objects interact. The formula for work done by a force is W = F × Δs, where W is work, F is force, and Δs is the distance moved in the direction of the force. Additionally, the work done by a gas can be calculated using W = p × ΔV, where p is pressure and ΔV is the change in volume of the gas.

PREREQUISITES
  • Understanding of basic physics concepts, specifically force and energy.
  • Familiarity with the formulas for work, including W = F × Δs and W = p × ΔV.
  • Knowledge of kinetic energy and its relationship to work.
  • Basic understanding of gas laws and pressure-volume relationships.
NEXT STEPS
  • Study the derivation of the Work-Energy Theorem in classical mechanics.
  • Explore applications of the Work-Energy Theorem in real-world scenarios.
  • Learn about the implications of the Work-Energy Theorem in thermodynamics.
  • Investigate the relationship between work, energy, and power in physics.
USEFUL FOR

Students of physics, educators teaching mechanics, and anyone interested in understanding the principles of energy transfer and work in physical systems.

Daniel2244
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Are the following definitions correct?

  • Work done as energy transferred
The energy transferred when the forces between two objects interact

  • Work done by a force
Work done = force x distance moved in the direction of force applied (W=F*Δs)

  • Work done by a gas
Work done = pressure x change in volume of gas (W=p*ΔV)
 
Last edited:
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Did you just... I mean, you answered the 2nd and the 3rd question yourself.
 
When a force is applied to a body and the body is displaced from its original position then work is done.

Work-Energy-Theorem.png

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