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## Homework Statement

The solutions are:

a)2,75J

b)11,4J

c)2,76m/s

d)3,5J

e)2,84m/s

## Homework Equations

## The Attempt at a Solution

I'm having problemas trying to integrate to find the letter A (the work)! I just can't put the values that match with x=0 (this one I know hehehe) and x=2(this one I don't know =/ )