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Questions and Answers
Which of the following is an example of a lever of first order?
Which of the following is an example of a lever of first order?
- Bottle opener
- Nut cracker
- Axe
- Scissors (correct)
What is a pulley?
What is a pulley?
- A simple machine with a fixed point around which a rod moves
- A device that reduces effort in completing work
- A wheel with a grooved rim with a rope used to lift heavy loads (correct)
- An inclined plane wrapped around a cylinder
Which of the following is not an example of a wedge?
Which of the following is not an example of a wedge?
- Screw (correct)
- Screwdriver
- Axe
- Knife
What is the difference between simple and complex machines?
What is the difference between simple and complex machines?
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What is a fulcrum in a lever?
What is a fulcrum in a lever?
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Study Notes
Simple Machines
- A lever of first order is a type of lever where the effort is applied between the fulcrum and the load.
Pulleys
- A pulley is a type of wheel with a grooved rim that changes the direction of a force or motion.
Wedges
- A wedge is not an example of a machine that uses a single rigid bar to pivot around a fixed point.
Simple vs Complex Machines
- Simple machines are basic components that make work easier, such as levers, pulleys, wedges, screws, and inclined planes.
- Complex machines are composed of two or more simple machines.
Levers
- A fulcrum in a lever is the pivot point or point of support where the lever rotates or moves.
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