# Young's modulus problem

1. Mar 11, 2007

1. The problem statement, all variables and given/known data
The asteriod Ceres has a mass of 1.11x10^21 kg and a diamter 772km. Ceres orbits the sun at an average distance of 414 million kilometers.
Estimate the change in length of a 2m length of thin copper wire caused by hanging a 1.5kg mass on the wire on the asteriod Ceres.
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2. Relevant equations

$$\begin{array}{l} g = \frac{{GM}}{{r^2 }} \\ a = \frac{{v^2 }}{r} \\ \end{array}$$

3. The attempt at a solution

Could somebody please give me some direction on how to approach these situation. Many thanks in return,

2. Mar 11, 2007

### Staff: Mentor

If you hung the mass from the wire on Earth, how much would the wire stretch? (Consider Young's modulus.) What's different on Ceres?

3. Mar 12, 2007