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## Homework Statement

A blue whale materializes 11.5 km above an airless planet with an acceleration of gravity of 6.85 m/s

^{2}. What is the speed of the whale right before impact? Use the work energy theorem.

## Homework Equations

Work energy theorem : W = the change in k

W=k

_{f}- k

_{o}

w=1/2(mv

_{f}

^{2}) - 1/2(mv

_{o}

^{2})