Question

An object with a volume of .5m^3 is dropped into a water tank. If it takes 9,874 N to lift the object on land, how much force will it take to lift it in the water? (Density of water is 1000kg/m^3)

Answer 1

$$F'=F-\rho gV$$

$$F'=9874-(1000)(9.81)(0.5)=4970\ N$$