a 1 kg block of aluminum and a 1 kg block of lead are immersed in water, Both sink, but which experienced the greater buoyant force? Why?1 kg of Aluminum will require more volume to occupy since it is lighter than lead. Lead has more density to Aluminum.So, when immersed in water Aluminum will displace more volume of water than lead. The buoyant force is equal to the Mass of water thus dispalced . Thus we can say Aluminum will experience more buoyant force.Buoyant force = weight of water displaced The thing that affects the weight displaced is the volume of the metal blocks. Both Aluminum and Lead have the same mass (1kg) but Lead is more dense than Aluminum (11.34g/cm^3 vs 2.70g/cm^3). As such, the 1kg of Aluminum has a greater volume than Lead and hence experienced the greater buoyant force.Other related question