Explain why pressure differences in a liquid produce an upwards force on submerged objects Explain your answer using Pressure in liquids (physics only) and pressure difference.

Pressure differences in a liquid create an upward force known as upthrust. This occurs because the pressure at greater depths is higher than at shallower depths, resulting in a net upward force acting on the submerged object.

A strong answer should address (Physics only) Explain why pressure differences in a liquid produce an upwards force on submerged objects directly. Use the context of Pressure in liquids (physics only) within Pressure and pressure differences in fluids (physics only), then state the relevant forces or motion reasoning with units where needed. The answer is correct when it names the key physics quantity, keeps force and pressure distinct, and links the conclusion back to the approved learning objective.