An object floats in a liquid with half of its volume submerged in the liquid. What is the magnitude of the buoyant force acting on the object?

In a fluid, the buoyant force acting on a submerged or floating object always acts _________.

A ship floats on water because:

When an empty plastic bottle with an airtight stopper is pushed deeper into a bucket of water, the increasing upward force that resists the downward push is known as __________.