Question

A buoy is held inside water contained in a vessel by tying it with a thread to the base of the vessel. Name the three forces that keep the buoy in equilibrium and state the direction in which each force acts.

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Answer

The three forces that keep the buoy in equilibrium are —

  1. Weight of buoy acting in the vertically downward direction.
  2. Upthrust of water on buoy acting in vertically upward direction.
  3. Tension in thread acting in the vertically downward direction.

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