A sphere falling through oil reaches terminal velocity when:

  1. weight = 0
  2. weight = upthrust + viscous drag
  3. drag = 0
  4. upthrust = 0
Answer

B) weight = upthrust + viscous drag

Net force zero, so no acceleration. SLO P-11-B-42 · Understanding

Physics MCQ · More Fluid Statics and Dynamics MCQs · Practise