Slideshare of unit 1.1, 1.2 & 1.3

Flash cards:

• Flashcards unit 1.1 MACHINES
• Inclined Planes 1.2
• Unit 1.3 Wheels, Pulleys and Gears

Videos:

• https://youtu.be/VHu4EedlqGk (Embed)
• https://youtu.be/igrMlzHL-qg (Embed)
• Caption: Video about simple machines
• Caption: Video about inclined planes

Unit 1.1:

• Effort: force applied to a lever to overcome the load.
• First-class lever: lever with effort and loads located at each end, and fulcrum in the centre.
• Force multiplier: machine that increases the force applied for a task, such as a first-class lever.
• Fulcrum: point about which a lever pivots.
• Lever: simple machines consisting of a rigid rod that pivots about a point.
• Load: force that a lever is used to overcome.
• Mechanical advantage: ration of a load force to the effort force used by a machine.
• Second-class lever: lever with the fulcrum located at one end, the effort at the other and the load in the centre.
• Simple machines: a device that makes work easier by changing the size or direction of a force.
• Speed multipliers: machines that requires a small movement of an effort to produce a large movement of a load, such as a third-class lver.
• Third-class lever: lever with the fulcrum located at one end

Unit 1.2:

• Inclined planes: a simple machine that reduces the effort needed to lift a load by increasing the distance it acts.
• Pitch: distance between adjacent threads on a screw.
• Ramp: an inclined plane used to help lift an object.
• Screw: a spiral-shaped inclined plane.
• Wedge: a double inclined plane, such as a knife or an axe.

Unit 1.3:

• Axle: shaft on which a wheel rotates
• Block and tackle: a system of two or more pulleys using rope or cable to lift heavy objects.
• Driven gear: the gear that receives force from a driving gear
• Driving gear: the gear that supplies the force to another gear.
• Gear ratio: ratio of the number of teeth on the driving gear and the number of teeth on a driver gear.
• Gear train: a system of interconnected gears.
• Gears: a wheel with teeth used to turn another gear wheel
• Pulley: a wheel with a groove over which a rope or cable can slide, used to change the direction of a force.
• Rim: outer edge of a wheel.
• Sprocket: a toothed wheel used to link onto a chain on a bicycle.
• Wheel: type of lever with an axle acting as its fulcrum.