block-and-tackle
Rope-and-wheels lifter
A block-and-tackle is a system of pulleys and ropes used to lift or move heavy loads.
The pulleys (blocks) are threaded with rope or cable (tackle) in a way that multiplies force—the more pulleys, the easier the lift.
Essential equipment for sailing, construction, and rigging: We used a block-and-tackle to hoist the engine out of the truck.
Grooved wheel for rope
- hoistRaise with tackle
- ropeThick twisted fibers
- sheaveChanneled wheel for rope
- mechanical advantageForce output over input
lifting · hauling · cable · load · winch · derrick · crane · fall
Temporary elevated work structure
- liftingRaising something heavy
- hoistingRaising with effort
- loadCarried weight or burden
- beamStructural support member
suspension · elevation · raising · lowering · positioning · rigging · safety · weight
Force output over input
- leverageBorrowed capital for amplified returns
- frictionResistance between touching surfaces
- loadCarried weight or burden
- effortApplied energy toward goals
work · tension · efficiency · simple machine · newton · equilibrium · displacement · torque
Wind-propelled water travel
- deckShip's flat surface
- mastVessel's sail support
- riggingRopes controlling ship sails
- halyardSail-hoisting tackle
sheet · boom · capstan · windlass · marlinspike · bosun · yardarm · cleat
Skilled way of performing
- linemanUtility pole worker
- offensive lineFootball's protective forward squad
- defensive lineBlockers facing the offense
- scrimmagePractice match with contact
gridiron · trenches · engagement · contact · push · leverage · stance · hand placement
pulley
Grooved wheel for rope
mechanical advantage · lifting · hauling · cable · load · winch · derrick · crane · fall · purchase
scaffold
Temporary elevated work structure
beam · suspension · elevation · raising · lowering · positioning · rigging · safety · weight · tension
mechanical advantage
Force output over input
- leverageBorrowed capital for amplified returns
- frictionResistance between touching surfaces
- loadCarried weight or burden
effort · work · tension · efficiency · simple machine · newton · equilibrium · displacement · torque · fulcrum
sailing
Wind-propelled water travel
halyard · sheet · boom · capstan · windlass · marlinspike · bosun · yardarm · cleat · belaying pin
technique
Skilled way of performing
- linemanUtility pole worker
- offensive lineFootball's protective forward squad
- defensive lineBlockers facing the offense
scrimmage · gridiron · trenches · engagement · contact · push · leverage · stance · hand placement · footwork