Physics 9702 · AS & A Level · Equilibrium of forces

Equilibrium of forces — practice question

A ball is descending at terminal speed in still air. The forces acting on the ball are upthrust, viscous drag and weight. In what order do these three forces increase in magnitude?

  • Aupthrust $\rightarrow$ viscous drag $\rightarrow$ weight
  • Bviscous drag $\rightarrow$ upthrust $\rightarrow$ weight
  • Cviscous drag $\rightarrow$ weight $\rightarrow$ upthrust
  • Dweight $\rightarrow$ upthrust $\rightarrow$ viscous drag

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