Calculating Work for a 71 kg Runner: Rest to 10.2 m/s Velocity

Thread starter CBears019
Start date Feb 2, 2009
Tags

Lost Theorem Work-energy Work-energy theorem

AI Thread Summary

To calculate the work needed for a 71 kg runner to accelerate from rest to a velocity of 10.2 m/s, the kinetic energy formula is essential. The change in kinetic energy can be determined using the equation KE = 0.5 * m * v^2, where m is mass and v is velocity. The work done on the runner is equal to this change in kinetic energy. Therefore, the work required is approximately 3,707.1 joules. Understanding the relationship between work and kinetic energy is crucial for solving this problem.

Feb 2, 2009

CBears019

Homework Statement

How much work is needed for a 71 kg runner to accelerate from rest to 10.2 m/s?

I have no idea how to do this so I have no equations or attmpts at this.

Last edited: Feb 2, 2009

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Feb 2, 2009

TFM

Okay, I believe you need to use the Work = Fd...

Edit: What happened to the Well Question?

Last edited: Feb 2, 2009

Feb 2, 2009

LowlyPion

Homework Helper

What change in kinetic energy has taken place?

How did that happen?

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