Answer :
Newton's Second Law explains how car acceleration and rocket propulsion work. Newton's Third Law can be observed in swimming, walking, and bird flight, where action and reaction forces are involved. These examples provide a practical understanding of Newton's laws.
Applications of Newton's Second Law of Motion
- Car Acceleration: When a car speeds up, the force produced by the engine causes the car to accelerate. According to Newton's Second Law, the acceleration of the car is directly proportional to the force applied and inversely proportional to the mass of the car (F = ma).
- Rocket Propulsion: When a rocket launches, the engines exert a force on the rocket, causing it to accelerate upwards. The more force the engines produce, the higher the rocket's acceleration, considering the combined mass of the rocket and its fuel.
Applications of Newton's Third Law of Motion
- Swimming: When a swimmer pushes against the water with their hands or feet, the water pushes back with an equal and opposite force, propelling the swimmer forward.
- Walking: As a person walks, they push against the ground with their foot. The ground pushes back with an equal and opposite force, allowing the person to move forward.
- Bird Flight: Birds flap their wings downward to push air down. According to Newton's Third Law, the air pushes back with an equal and opposite force, which helps to lift the bird up into the sky.
