Calculate: There are three 50 g. cubes on a boat. Notice that
the boat has filled up with water and sunk to the bottom. In this
model, the walls of the boat are very thin. Therefore, the volume
of water displaced by the boat is equal to the volume of water
displaced by the cubes.
Each cube is 2 cm × 2 cm × 2 cm. What is the volume of each
cube? 8 cm^3
What is the total volume of cubes in the boat? 24
cm^3
If the water density is 1.0 g/mL, what is the mass of displaced
water? 125 g.
What is the weight of displaced water? (Recall w =
m • 0.00982) 1.2275 N.
What is the buoyant force on the boat?
__________
What is the mass and weight of the boat? Mass: 150
g. Weight: 1.47 N.
What is the net force on the boat? (Hint: Downward force is
negative.) -1.23 N.