Questions and Answers
What is a lever?
Made up of a bar that turns on a fixed point or a fulcrum.
Which of the following is an example of a lever? (Select all that apply)
What is a screw?
An inclined plane wound around a cylinder.
Which of the following items is an example of a screw? (Select all that apply)
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What is a pulley?
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Which of these is an example of a pulley? (Select all that apply)
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What does the term 'wheel and axle' refer to?
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Which of the following are examples of wheels and axles? (Select all that apply)
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What is an inclined plane?
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Which of the following are examples of inclined planes? (Select all that apply)
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What is a wedge?
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Which of the following items is an example of a wedge? (Select all that apply)
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What is a block and tackle?
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Which of the following items is an example of block and tackle? (Select all that apply)
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What is a moveable pulley?
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Which of the following are examples of moveable pulleys? (Select all that apply)
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What is a fixed pulley?
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Which of the following examples illustrates a fixed pulley? (Select all that apply)
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Study Notes
Simple Machines Overview
- Simple machines are mechanical devices that change the direction or magnitude of a force, facilitating work.
Lever
- A lever consists of a bar that pivots at a fixed point known as a fulcrum.
- Examples: light switch, seesaw, hammer, wheelbarrow.
Screw
- A screw is an inclined plane wrapped around a cylinder, enabling it to convert rotational motion into linear motion.
- Examples: light bulb, drill, toothpaste cap, and tube.
Pulley
- A pulley consists of a rope that passes over a grooved wheel, primarily used to lift objects.
- Examples: flagpole, ski lift.
Wheel and Axle
- This consists of a central rod (axle) that allows the wheel to turn around it, reducing friction for movement.
- Examples: bike, car, wagon.
Inclined Plane
- An inclined plane is a flat or curved surface that elevates at one end, making it easier to lift objects.
- Examples: slide, stairs, ramp.
Wedge
- A wedge is formed by two inclined planes, featuring a wider end; used for cutting, splitting, or pushing objects apart.
- Examples: knife, teeth, axe, zipper.
Block and Tackle
- Block and tackle uses two or more pulleys working in tandem, enabling less force to lift heavier loads as additional wheels reduce required effort.
- Example: ropes on a ship.
Moveable Pulley
- A moveable pulley consists of a rope and wheel that shifts along a cable, providing mechanical advantage by distributing weight.
- Examples: zip line, cable car, and the wheel that slides on a pulley.
Fixed Pulley
- A fixed pulley consists of a wheel and rope that are affixed in place, primarily used to change the direction of force without altering position.
- Examples: the wheel and rope used to lift a bucket from a well, and window blinds.
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Description
This quiz features flashcards that help you learn about six simple machines, focusing on their definitions and real-world examples. Explore terms such as lever, screw, and pulley, along with relevant examples to enhance your understanding of these fundamental concepts in physics.
