Podcast
Questions and Answers
A lever is a rigid ______ or beam that pivots around a fixed point (fulcrum)
A lever is a rigid ______ or beam that pivots around a fixed point (fulcrum)
bar
Pulleys change the direction of ______ or motion, making it easier to lift or move heavy loads
Pulleys change the direction of ______ or motion, making it easier to lift or move heavy loads
force
A screw is an inclined ______ wrapped around a cylindrical shaft
A screw is an inclined ______ wrapped around a cylindrical shaft
plane
Wheels reduce ______, making it easier to move heavy loads
Wheels reduce ______, making it easier to move heavy loads
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An inclined ______ is a flat surface tilted at an angle
An inclined ______ is a flat surface tilted at an angle
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Examples of wheels and axles include ______, bicycles, and Ferris wheels
Examples of wheels and axles include ______, bicycles, and Ferris wheels
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Study Notes
Simple Machines
Levers
- A lever is a rigid bar or beam that pivots around a fixed point (fulcrum)
- Levers can be used to lift, push, or move heavy loads with less effort
- There are three types of levers:
- First-class levers: Fulcrum is between the effort and load
- Second-class levers: Load is between the effort and fulcrum
- Third-class levers: Effort is between the load and fulcrum
Pulleys
- A pulley is a wheel with a grooved rim and a rope, cable, or chain wrapped around it
- Pulleys change the direction of force or motion, making it easier to lift or move heavy loads
- There are two types of pulleys:
- Fixed pulleys: The pulley is attached to a fixed object
- Movable pulleys: The pulley is attached to the load
Screws
- A screw is an inclined plane wrapped around a cylindrical shaft
- Screws convert rotary motion into linear motion
- Examples of screws include:
- Screwdrivers
- Jar lids
- Bolts and nuts
Wheels and Axles
- A wheel is a circular object that rotates around a fixed axis (axle)
- Wheels reduce friction, making it easier to move heavy loads
- Examples of wheels and axles include:
- Cars
- Bicycles
- Ferris wheels
Inclined Planes
- An inclined plane is a flat surface tilted at an angle
- Inclined planes change the direction of force or motion, making it easier to lift or move heavy loads
- Examples of inclined planes include:
- Ramps
- Stairs
- Ladders
Simple Machines
Levers
- Rigid bar or beam that pivots around a fixed point (fulcrum) to lift, push, or move heavy loads with less effort
- Three types of levers:
- First-class: Fulcrum between effort and load
- Second-class: Load between effort and fulcrum
- Third-class: Effort between load and fulcrum
Pulleys
- Wheel with a grooved rim and a rope, cable, or chain wrapped around it to change direction of force or motion
- Two types of pulleys:
- Fixed pulleys: Attached to a fixed object
- Movable pulleys: Attached to the load
Screws
- Inclined plane wrapped around a cylindrical shaft to convert rotary motion into linear motion
- Examples:
- Screwdrivers
- Jar lids
- Bolts and nuts
Wheels and Axles
- Circular object that rotates around a fixed axis (axle) to reduce friction and make it easier to move heavy loads
- Examples:
- Cars
- Bicycles
- Ferris wheels
Inclined Planes
- Flat surface tilted at an angle to change direction of force or motion and make it easier to lift or move heavy loads
- Examples:
- Ramps
- Stairs
- Ladders
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Description
Learn about levers and pulleys, types of simple machines used to lift, push, or move heavy loads with less effort. Understand the different types of levers and how pulleys work.
