Reaction force

principle · 1687 · Early modern era

Throwing mass one way pushes a body the other way (Newton’s third law).

Author: Isaac Newton.

Where it is used

• Heron’s aeolipile — is used in. Jets of steam spin the ball by reaction force.
• Turbojet engine — is used in. Thrust is the reaction of the jet.
• Rocket — is used in. A rocket moves by reaction force.
• Firearm — is used in. Recoil is Newton’s third law.
• Machine gun — is used in. Recoil energy reloads the weapon.
• Water-jet propulsion — is used in. A jet of water.
• Ramjet — is used in. Jet thrust.
• Ion thruster — is used in. Jet thrust.
• De Laval nozzle — is used in. It accelerates gas, creating thrust.

What it is a kind of

• Newton’s laws — is a kind of. Reaction is Newton’s third law.

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