A 2.5-kg object falls vertically downward in a viscous medium at a constant speed of 2.5 m/s.How much work is done by the force the viscous medium exerts on the object as it falls 80 cm?
A)+2.0 J
B)+20 J
C)-2.0 J
D)-20 J
E)+40 J

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The Answer of A 2.5-kg object falls vertically downward in a viscous medium at a constant speed of 2.5 m/s.How much work is done by the force the viscous medium exerts on the object as it falls 80 cm?
A)+2.0 J
B)+20 J
C)-2.0 J
D)-20 J
E)+40 J

A 25-Kg Object Falls Vertically Downward in a Viscous Medium at at a Constant