I. Jet propelled aircraft II. Rocket propulsion III. The recoil of a gun IV. A person walking Which of the above is based on Newton's third law of motion
Which of the above is based on Newton's third law of motion
Answer Details
Newton's third law of motion states that for every action, there is an equal and opposite reaction. Among the given options, the following satisfy this law:
- III. The recoil of a gun: The action is the explosion of gas in the gunpowder which creates a forward force on the bullet and an equal and opposite force on the gun, causing the gun to recoil.
- I. Jet propelled aircraft: The action is the expulsion of gases from the back of the jet engine, which creates a forward force on the aircraft, and an equal and opposite force in the opposite direction.
- II. Rocket propulsion: The action is the ejection of exhaust gases from the nozzle of the rocket, which creates a forward force on the rocket, and an equal and opposite force in the opposite direction.
Therefore, the answer is: I, II, and III only.