How do impact wrenches work?

How exactly do impact wrenches (and impact screwdrivers) work - as opposed to how "ordinary" drills work?

TABLE OF CONTENTS:
00:00 Introduction
00:53 Lever principle
03:37 Gear ratios
06:21 Ordinary drills
08:20 Kinetic energy 1 & 2
10:46 Impact wrench mechanism
14:30 Impact rated bits and sockets
17:02 Screwing into wood
20:30 Conclusion? :)

Useful LINKS:

Torque and power - basics explained (video):
https://www.bikegremlin.com/2181/torque-and-power-basics-explained/

Power (physics) basics explained (video):
https://www.bikegremlin.com/2177/power-physics-basics-explained/

How to PROPERLY shift gears on a bicycle? (video):
https://www.bikegremlin.com/1043/how-to-properly-shift-gears-on-a-bicycle/

Inertia, kinetic energy, and mass VS weight explained (video):
https://www.bikegremlin.com/2189/inertia-kinetic-energy-and-mass-vs-weight-explained/

Bolted connection and tightening torque basics (video):
https://www.bikegremlin.com/2185/bolted-connection-and-tightening-torque-basics/

Materials and material properties explained:
https://bike.bikegremlin.com/11144/bicycle-frame-materials-explained/

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id: 1245

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To keep everything organized, I’m only providing answers there. Thank you for understanding!
Relja Novović

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