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Forces in fluids and density

A fluid is a substance that can flow, so liquids and gases are both fluids. An object in a fluid may experience weight downward, upthrust upward, and drag opposite its motion.

Density, upthrust and viscous drag Lesson

Step-by-step lessons covering Edexcel AS Level Physics Density, upthrust and viscous drag for AS Level Physics. Each lesson works through exam-style questions.