1. Word cloud
120 seconds
name an example of a lever?
2. Slide
60 seconds
A lever is a simple machine that helps you move things with less effort. Levers let you lift heavy things with just a little force. Levers help you change the direction and distance of a force.
Lever Basics
3. Slide
60 seconds
A lever is a tool that is used to help lift or move an object by using a force called a fulcrum. The fulcrum is the point at which the lever pivots, and the object is moved by pushing down on one end of the lever. There are three types of levers: first class, second class, and third class. First class levers have the fulcrum at the middle, second class levers have the load at the middle, and third class levers have the force at the middle. The mechanical advantage of a lever is the ratio of the distance between the fulcrum and the load to the distance between the fulcrum and the force.
Concepts:
4. Slide
60 seconds
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60 seconds
The lever was first studied by Greek philosopher and scientist Archimedes in the 3rd century B.C. The lever is the simplest machine, made up of only two parts: a lever and a fulcrum. The lever can be used to lift objects that are heavier than the user by using the force of gravity.
Did you know?
6. Open question
300 seconds
How does a lever help us do work?
7. Personalised Feedback
360 seconds
What is the difference between a first-class lever and a second-class lever? Can you provide examples of each?
8. Open question
300 seconds
What did you learn about levers?
9. Slide
60 seconds
Class 1 levers have the fulcrum placed between the effort and the load. This type of lever is often used in trebuchets. It's time to see how they work together!
Exploring Class 1 Levers
10. Slide
60 seconds
Trebuchets are incredible machines used for launching projectiles. They consist of a frame, a pivot point, a counterweight, an arm, a sling, and a projectile. By utilizing the lever mechanism, trebuchets can achieve impressive power and range.
Unveiling the Trebuchet's Secrets
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60 seconds
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60 seconds
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