Simple machine - Wikiwand
The Six Simple Machines | TechStuff
- Lever - Wikiwand
Class 1:Seesaw, crowbar; mechanical advantage varies; motion is opposite to direction of force applied
Class 2: nutcracker, bottle opener; mechanical advantage > 1; motion is in same direction of force applied
Class 3: bat, hockey stick; fishing rod; mechanical advantage < 1; motion is in same direction of force applied
Levers- EnchantedLearning.com - Wheel and axle - Wikiwand
- Pulley - Wikiwand
Why Snatch Blocks are AWESOME (How Pulleys Work) - Smarter Every Day 228 - YouTube - Inclined plane (ramp) - Wikiwand
- Wedge (mechanical device) - Wikiwand
Change direction of force - Screw (simple machine) - Wikiwand
Mechanical advantage - Wikiwand
> 1 means force is amplified; < 1 means distance (hence speed) is amplified
Mechanical efficiency - Wikiwand
【機械效益】 省力滑輪組
How Levers, Pulleys and Gears Work - YouTube
Mechanical Principles demonstrated with LEGO 02 - YouTube
Complex machines
Scissors: Lever + Wedge
Geneva Mechanism - Quora turns rotary motion to an intermittent one
Electromechanics
Cam: turns rotary movement to linear movement
The Computer-free Automation of a Jukebox (Electromechanics) - YouTube