What is the speed with kinetic energy

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Homework Help Overview

The discussion revolves around determining the speed of a baseball given its mass and kinetic energy. The subject area is physics, specifically focusing on the concept of kinetic energy and its relationship to speed.

Discussion Character

  • Exploratory, Assumption checking, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the arithmetic involved in calculating speed from kinetic energy, with some questioning the accuracy of the calculations performed by the original poster. There is an emphasis on verifying the computations and checking for potential errors.

Discussion Status

The discussion is ongoing, with participants providing guidance to re-evaluate the calculations. There is a focus on ensuring that the arithmetic is correct, and some suggest checking the results against the kinetic energy equation to identify any discrepancies.

Contextual Notes

The original poster mentions that the assignment provides immediate feedback on correctness, which may influence their approach to verifying their solution.

kadavis2010
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Homework Statement


What is the speed of a 0.145 kg baseball if it's kinetic energy is 105 J? Answer units in of m/s


Homework Equations


kinetic energy = 1/2mv^2


The Attempt at a Solution


105= 1/2(0.145)v^2
105= .0725v^2
v= 36.06
 
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What seems to be the problem? I would check that arithmetic again, with a calculator if possible.
 
Agreed, check your numbers.
 
Well it's an online assignment so it imediantly tells me if i am right or wrong... I did it with a calculator several times... What am I doing wrong?
 
Use your answer, plug it back into the KE equation, and tell us what you get. You might find a 10 percent error.
 

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