Kinetic Energy: What am I doing wrong?

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Homework Help Overview

The discussion revolves around calculating the kinetic energy of a car with a specified mass and speed, focusing on the application of the kinetic energy formula.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the application of the kinetic energy formula, with one participant noting a potential error in the mass used. There is also a consideration of significant figures and the context of the answer submission.

Discussion Status

The discussion has evolved with participants providing feedback on the original poster's calculations and assumptions. There is acknowledgment of a possible misunderstanding regarding the answer submission process.

Contextual Notes

Participants are exploring the implications of using incorrect values and the importance of significant figures in their calculations. There is mention of a specific answer blank that may have contributed to confusion.

kadavis2010
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Homework Statement


A (n) 1880 kg car travels at a speed of 14.7 m/s. What is it's kinetic energy? Answer in units of J.

Homework Equations



Kinetic energy= 1/2mv^2

The Attempt at a Solution


1/2(188)(14.7)^2= 20312.46
My answer is wrong though...
What did i do? I keep getting all the kinetic problems i have wrong and i am following the formula...
 
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It's supposed to be 1880 kg, you used 188 kg.
 
Ok so now i did .5(1880)(14.7)^2 = 203124.6
It's still wrong...
 
Why do you say its wrong? Is the answer your comparing it two 203000? or even 200000? It could be sig figs.
 
Ahh i figured it out. I was submitting it in the wrong blank.
 

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