On a stationary sail - boat , air is blown at the sails from a fan attached to the boat. The boat will

Options :
  1. remain stationary
  2. spin around
  3. move in a direction opposite to that in which air is blown
  4. move in the direction in which the air is blown

Answer and Explanation :-

Answer: Option 1


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By: tarun On: Jan/31/2015

On a stationary sail boat, air is blown from a fan attached to the boat. The boat will remain at rest as there is no external force acting on the boat.
The air blown from the fan is a part of the boat. A force acts on the sail of the boat which is equal and opposite to reaction force acting on the fan. So the net force on the system is 0.

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