Key concepts Physics Simple machines Wedges Air pressure Introduction Looking for a cool and surprising project to show to your friends? Give this activity a stab! Take a potato and a straw ...

“I think it’s really cool to build something using a bunch of different (simple) machines,” she said. Both students said the project taught them problem-solving skills, which Fletcher said ...

In this project you will use simple household materials to explore one of these classic machines: the pulley. Background Pulleys are simple machines that can make the job of lifting objects easier.