"Join me as we solve the inclined half-Atwood problem with friction! In this video, we’ll break down the forces acting on the system, including friction, gravity, and tension, and use Newton’s Second ...

Q: I read a column on your website about rock retaining walls. I'm having a hard time believing you can build a lasting wall and not use mortar between the stones. What's the secret? A: Why the ...

This video guides you through the process of calculating the acceleration of a block sliding down an inclined plane with ...

Resistance is a force that slows the movement of one object over another. It can occur in liquids, such as water and in air. Air resistance is a type of friction between air and another material.

Q: Tim, I read a column on your website about rock retaining walls. I’m having a hard time believing you can build a lasting wall and not use mortar between the stones. I’d love to just build a wall ...

Q. Tim, I read a column on your website about rock retaining walls. I’m having a hard time believing you can build a lasting wall and not use mortar between the stones. I’d love to just build a wall ...