Newton's 3rd Law Review

These flashcards cover key concepts related to Newton's 3rd Law and its applications, as discussed in the lecture.

Newton's 3rd Law

For every action, there is an equal and opposite reaction.

Force pairs

Forces only occur in pairs; action and reaction forces act on different objects.

Magnitudes of forces

The magnitudes of action and reaction forces are equal, but they act on different objects.

Hammer and nail interaction

Each exerts a force on the other; hammer on nail and nail on hammer.

Reaction force when swimming

When you push the water backwards, the reaction force is the water pushing you forward.

Bowstring and arrow interaction

The bowstring forces the arrow forward, while the arrow exerts a reaction force back on the bowstring.

Force when walking

When you push on the floor, the floor exerts a reaction force pushing you along.

Force against a wall

If you hit a wall with a force of 200 N, the wall exerts an equal reaction force of 200 N back.

Acceleration and mass relationship

In collisions, forces have the same magnitude, but the object with a smaller mass (e.g., bullet) will have a greater acceleration.

Earth's acceleration towards a jumper

The Earth does accelerate towards you when you jump, but the acceleration is not noticeable due to its large mass.

Satellite in orbit

A satellite in low Earth orbit exerts a reaction force equal to the force exerted by the Earth on it.

Rocket propulsion in space

A rocket is propelled in space by exhaust gases exerting a reaction force in the opposite direction of the rocket's motion.