Q58
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
AnswerC.
moves in the same direction in which air blows
D.
spins around
Answer: Option B
Solution
Answer: Option B
Solution:
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.