In 1990, walter arfeuille of belgium lifted a 281.5 kg object through a distance of 17.1 cm using only his teeth
(a) how much work was done on the object by arfeuille in this lift, assuming the object was lifted at constant speed?

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im thinking \[-\Delta U_{GRAV}?\]

Right-o!

so \[\implies -(281.5)(9.8)(0-0.171)?\]
i change this to meters right?

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