Question

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

• A. moves in opposite direction in which the air is blown
• B. does not move
• C. moves in the same direction in which air blows
• D. spins around

Answer 1

The correct option is B does not move

In this case air blown by the fan will try to push the sail boat in a certain direction.But at the same time due to Newton's third law of motion the fan will experience a force due to the air blown in a direction opposite to the direction in which the sail boat will experience the force due to the blown air.So, as a whole the system will be at rest and it will not move