Newton’s Three Laws Explained


🧠 Newton’s Laws of Motion

Sir Isaac Newton explained how things move using 3 simple rules, called laws.


1️⃣ First Law: Objects like to keep doing what they are doing

(Law of Inertia)

What it means:

  • Things stay still if they are still.
  • Things keep moving if they are moving.
  • Unless something pushes or pulls them.

Easy example:

  • A book on a table does not move until you push it.
  • A rolling ball keeps rolling until it hits something or slows down.

🧠 Easy line:

No push → no change


2️⃣ Second Law: Push harder, move faster

(Force = Mass × Acceleration)

What it means:

  • A bigger push makes something move faster.
  • Heavier objects are harder to move than light ones.

Easy example:

  • Kicking a soccer ball is easy.
  • Kicking a big rock is hard!
  • Push a toy car softly → it moves slowly.
  • Push it hard → it moves fast.

🧠 Easy line:

Hard push = fast move


3️⃣ Third Law: Every action has a reaction

(Action–Reaction)

What it means:

  • When you push something,
  • It pushes back on you.

Easy example:

  • Jumping off the ground → ground pushes you up
  • Swimming → you push water back, water pushes you forward
  • Rocket launch → gas goes down, rocket goes up 🚀

🧠 Easy line:

Push back happens!


🎯 Fun memory trick

  • 1st Law: Stay the same
  • 2nd Law: Push decides speed
  • 3rd Law: Push back!

🌟 Why are these laws important?

  • Help us understand sports
  • Help build cars, planes, rockets
  • Explain how we walk, run, and jump

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