Question
Question: On a stationary sail-boat, air is blown at the sails from a fan attached to the boat. The boat will...
On a stationary sail-boat, air is blown at the sails from a fan attached to the boat. The boat will
A
Remain stationary
B
Spin around
C
Move in a direction opposite to that in which air is blown
D
Move in the direction in which the air is blown
Answer
Remain stationary
Explanation
Solution
The force exerted by the air of fan on the boat is internal and for motion external force is required.