Seat belts (First Law): In a sudden brake, passengers continue forward by inertia. Seat belts apply the backward force (F = ma) needed to decelerate the passenger safely. Without it, the passenger hits the dashboard — pure inertia.

Rockets (Third Law): Exhaust gases ejected backward (action) → rocket pushed forward (reaction). Forces act on different bodies (exhaust and rocket). Works in vacuum — no air needed to "push against."

Anti-lock Braking Systems (ABS): Prevents wheel lock-up to keep tires in static friction regime (μ_s) rather than kinetic (μ_k). Since μ_s > μ_k, maximum braking force is higher and steering is maintained during braking.

Banked highways: Curved roads are banked at angle θ = arctan($v^{2}$/rg) to allow vehicles to navigate curves at design speed without depending on friction, preventing skidding even on wet roads.

Elevator weighing scales: Scale reads apparent weight N = m(g ± a), not true weight. This is why you feel heavier accelerating upward and lighter decelerating upward (= accelerating downward).

Weighing in space: Astronauts in the International Space Station (orbit ~400 km) appear weightless despite g ≈ 8.7 m/$s^{2}$ there. They are in continuous free fall — the station falls around Earth — so apparent weight is zero.

Washing machine spin cycle: High-speed rotation: drum provides centripetal force inward. Water cannot receive sufficient centripetal force and exits through holes — effective dewatering using inertia.

Wheels replacing sliding (Rolling friction): μ_r << μ_k. Rolling a heavy object requires far less force than sliding it. Invention of the wheel is essentially exploitation of the rolling friction hierarchy.

Sports (running, javelin): Athletes push backward on the ground (action); ground pushes athlete forward (reaction). The friction force from the ground is the reaction force enabling acceleration.

Walking on ice: Low μ_s on ice → small maximum static friction → hard to push backward → small reaction force → small forward acceleration. That is why walking on ice is difficult and slow.