The formula for calculating the force needed to submerge an object in water is F = ρVg, where F is the force, ρ is the density of water (1000 kg/m3), V is the volume of the object, and g is the acceleration due to gravity (9.8 m/s2).
The density of water is 1000 kg/m3 at standard temperature and pressure.
The volume of an object can be determined by dividing its mass by its density. In this case, the volume of a 5 kg object can be found by dividing 5 kg by the density of water (1000 kg/m3), giving a volume of 0.005 m3.
The acceleration due to gravity affects the force needed to submerge an object because it determines the weight of the object. The greater the weight, the greater the force needed to submerge it in water.
Yes, this formula can be used for objects with different densities. However, the density of the object should be substituted for ρ in the formula. For example, if the object has a density of 800 kg/m3, the formula would become F = 800Vg.