Power and velocity physics homework

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Homework Help Overview

The discussion revolves around calculating the power required to change the speed of a 1600 kg SUV from 15.0 m/s to 40.0 m/s over a duration of 4.0 seconds. The subject area includes concepts of power, work, and kinetic energy in physics.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • The original poster attempts to apply the formulas for power and work but expresses uncertainty about the sufficiency of the provided information. Other participants suggest calculating the change in kinetic energy as a potential approach.

Discussion Status

Participants are exploring different methods to approach the problem, with some guidance offered regarding the calculation of kinetic energy. There is an ongoing exchange of ideas without a clear consensus on the next steps.

Contextual Notes

The original poster indicates a feeling of insufficient information, which may reflect constraints in the problem setup or assumptions that need to be clarified.

ajmCane22
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Homework Statement


What is the power needed to change the speed of a 1600 kg SUV from 15.0 m/s to 40.0 m/s in 4.0 seconds



The Attempt at a Solution


I know that P = W/t and W = F/d, but I feel like there is not enough info to use this equation. Am I missing something?
 
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Can you calculate the change in the SUV's kinetic energy?
 


Oh! So I would use [tex]\Delta[/tex]K = 1/2m(Vf^2-Vi^2)?
 


Yes, that's the change in energy.
 

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