Third graders understand what a pulley is and how it works. In this simple machines, pulley instructional activity students experiment with broom sticks creating a pulley. Students observe how the pulley moves in its different trials.

Students investigate the relationship between work and mechanical advantage. In this physics lesson, students calculate the work and efficiency of pulleys. They identify the different types of pulleys.

For this work worksheet, high schoolers review the equation for work, potential and kinetic energy, and the Law of Conservation of Energy. This worksheet has 22 fill in the blank and 7 short answer questions.

Students collect and analyze data about wind speed. They build a Lego wind sail and measure the wind speed with a rotation sensor. They use software to analyze the data.

Learn about levers and make the connection between these simple machines and the human body.

A thorough discussion of all the simple machines, beginning with some thoughts on mechanical advantage and conservation of energy. Very complete. Move down to the section that interests you.

[Free Registration/Login Required] Drag the labeled triangles to indicate where the fulcrum of this third-class lever is as well as the input and output forces.

Explains what a lever is, its history, how it works, the formula for calculating its mechanical advantage, classes of levers, and uses of levers.

This lesson will introduce the concept of Mechanical Efficiency and explain how to calculate it for simple machines. It is 3 of 3 in the series titled "Mechanical Efficiency."

This lesson will introduce the concept of Mechanical Efficiency and explain how to calculate it for simple machines. It is 1 of 3 in the series titled "Mechanical Efficiency."

This lesson will introduce the concept of Mechanical Efficiency and explain how to calculate it for simple machines. It is 2 of 3 in the series titled "Mechanical Efficiency."