Posted by **cristopher** on Thursday, November 15, 2012 at 10:04pm.

Jai-Anna, who has a mass of 45 kilograms, climbed 3 meters up a ladder to rescue her cat from a tree. How much work against gravity did she do?

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**hj**, Sunday, March 30, 2014 at 7:01pm
ghgh

- science -
**Sam**, Friday, December 2, 2016 at 8:44pm
i dont know

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