Problem 2a

Given information

Buoyant force acting on ship:

Weight of ship:   

Step-by-step explanation

• The weight of the fluid displaced equals the buoyant force on the item. The fluid's gravitational force can be considered to act at the fluid's centre of gravity (see Sections 7–8). If the object were to be removed from the fluid and replaced with an equal volume of fluid,
• That fluid would be in a state of balance. Because that volume of fluid is only subjected to two forces,

• They must overcome gravity and the buoyant force.