Ballast tanks in a submarine are filled with water to:

  1. increase the upthrust
  2. make it float higher
  3. reduce its weight
  4. increase its weight so it dives
Answer

D) increase its weight so it dives

Pumping water out makes it rise. SLO P-11-B-34 · Application

Physics MCQ · More Fluid Statics and Dynamics MCQs · Practise