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sAXIn

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I intgrate 2 times and find X(t) , i used innitial conditions given x=0 , t=0 , v=0 .

1) now they ask me to write the work done by the power between t=0 , t=<epsilon> I know that dw=F dot DX but here the f and x are both functions of t so ... ?

2) after that i need to write the power of the force on time t>0 i think interval t=0 , t=t ... ?

thank's in advance