A tin cup has a total volume of .012m^3 and mass of .13kg. How many grams of lead shot of density 11.4g/cm^3 could it carry without sinking in water? the question i have here is what is equal to what and how to solve this? so far.. i have.. Ftin = Vpg = .012m^3 * 7310kg/m^3 * 9.8m/s^2 = 860N the tin alone pushes down 860N onto the water. how can i find the force pushed by the water in the sink? cause once i find this force, i can set the equation.. Ftin + Flead = Fwater once i get the Flead, i can solve for mass by Flead / g..