Elevator going down; Main energy transformation?

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SUMMARY

The main topic of the discussion revolves around the energy transformations occurring when an elevator descends. The user initially hypothesizes that gravitational energy converts to kinetic energy; however, they realize that when moving at a constant speed, the elevator does not gain kinetic energy. Instead, the energy transformation involves a loss of potential energy, while the elevator's engine must exert power to counteract gravitational forces, confirming that the correct answer is D. The user seeks clarification on the factors that determine kinetic energy, specifically velocity and mass, which remain constant during descent.

PREREQUISITES
  • Understanding of gravitational potential energy and kinetic energy concepts
  • Familiarity with the formula P=F*v in physics
  • Knowledge of energy transformation principles
  • Basic grasp of constant speed motion dynamics
NEXT STEPS
  • Research the principles of energy conservation in mechanical systems
  • Study the role of friction and resistance in elevator mechanics
  • Learn about the dynamics of constant velocity motion in physics
  • Explore the relationship between mass, velocity, and kinetic energy in detail
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Students studying physics, particularly those focusing on mechanics and energy transformations, as well as educators looking for practical examples of energy concepts in real-world applications.

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Homework Statement


Hi! In the attachment :)


The Attempt at a Solution


Okay! By looking at the question I would've intuitively guessed that the answer would've been perhaps A. gravitational energy→kinetic energy! But then I thought of the P=F*v formula. If the elevator is going down at a constant speed, then it's not given a lot of KE (i would think!) . And since it's going downwards, It's also losing potential energy. What I'm confused about then is where the energy goes. Does the elevator engine need to provide any power in going down? I would've thought gravity would do the work! Could anybody give me any useful leads/tips? I've found that the answer is D but am still kind of at a loss with this one. Thankyou in advance!
 

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What does kinetic energy depend on? By that I mean, what determines kinetic energy? Because if what determines it doesn't change, then it cannot change.
 
Hmm. Velocity and mass. Which are cosntant...! So kinetic energy doesn't change to another form of energy, then?
 

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