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

Hint: There are three newton’s laws of motion and that are newton’s first law, newton’s second law and newton’s third law. Newton’s law of motion stated that acceleration of an object is directly proportional to net force and inversely proportional to mass. The force has both magnitude and direction.

Complete step by step solution:
Newton’s first law states that an object at rest continuous to be at rest and an object at motion continuous to be at motion until unless an external force acts on it and velocity of the object is constant when the net force on the body is zero. Newton’s first law is also called the principle of inertia.
Newton’s second law states that the rate of change of momentum of a body with respect to time is directly proportional to the applied force in the same direction as the applied force and inversely proportional to mass.
Newton’s third law states that for every action there will be an equal and opposite reaction.
Air blown by the fan try to push the sail boat in a certain direction .due to newton’s third law of motion the fan will experience a force because air blown in a direction opposite to the direction in the applied force on the sail boat due to the blown air because of this the whole system will not move.
So the correct option is B.
Note: Students Newton’s law of motion explains the relationship between motion of object and the force which is acting on the object. The force which causes a change in velocity and change in velocity creates a force. Newton’s second law of motion to relate the motion of the object to the forces involved. Objects with constant masses are used in Newton’s second law.