Newton's Law of Motion

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Newton's First Law of Motion (Law of Inertia)

1. Car Braking: When a car suddenly stops, passengers lurch forward due to their inertia, as they continue moving at the same speed until an external force (seatbelt or dashboard) acts on them.

2. Table Fan Blades: After turning off a fan, the blades continue to spin for a while due to their inertia, demonstrating that an object in motion stays in motion unless acted upon by an external force.

3. Book on a Table: A book remains at rest on a table until someone applies a force to move it.

4. Skateboarder: A skateboarder will continue moving forward if they hit an obstacle unless they use their body to apply a force and stop.

5. Elevator Ride: When an elevator descends quickly, blood rushes to the feet due to inertia, causing a feeling of lightheadedness as the body is momentarily left behind.

Newton's Second Law of Motion (F = ma)

1. Kicking a Soccer Ball: The harder you kick the ball (force), the further it goes (acceleration), illustrating the relationship between force, mass, and acceleration.

2. Racing Cars: Engineers reduce the mass of racing cars to increase acceleration, showing that less mass with the same force results in greater acceleration.

3. Shopping Cart: Pushing an empty shopping cart requires less force than pushing a full one, demonstrating that acceleration depends on mass.

4. Rocket Launch: A rocket accelerates upward as its engines exert a large force against Earth's gravity, showcasing how mass and force affect motion.

5. Car Collision: In a collision, the impact force depends on the masses and speeds of the vehicles involved, illustrating how greater mass and speed increase the resulting force.

Newton's Third Law of Motion (Action-Reaction)

1. Bird Flight: When birds flap their wings downwards (action), they push air down and are propelled upwards (reaction).

2. Sitting in a Chair: When you sit, your body exerts a downward force on the chair (action), and the chair exerts an equal upward force (reaction) that supports you.

3. Swimming: Swimmers push water backwards with their hands and feet (action), which propels them forward (reaction).

4. Balloon Propulsion: Releasing air from an inflated balloon pushes air out one way (action) and causes the balloon to move in the opposite direction (reaction).

5. Rocket Engine: The gases expelled from a rocket engine push downwards (action), propelling the rocket upwards (reaction) according to Newton's third law.

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⏰ Last updated: Mar 13 ⏰

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