Before we get started on today's project we will continue to work on our bridges. Make sure your group fills out the form on last weeks post.
This week we will be looking at bungee jumping science. I have a few videos that we will be looking at to help us understand some of the science behind bungee jumping.
What we need to first look at is the difference of potential and kinetic Energy.
- The coil spring of a wind-up clock
- An archer's stretched bow
- A bent diving board, just before a divers jump
- The twisted rubber band which powers a toy airplane
- A bouncy ball, compressed at the moment it bounces off a brick wall.
An object designed to store elastic potential energy will typically have a high elastic limit, however all elastic objects have a limit to the load they can sustain. When deformed beyond the elastic limit, the object will no longer return to its original shape. In earlier generations, wind-up mechanical watches powered by coil springs were popular accessories. Nowadays, we don't tend to use wind-up smartphones because no materials exist with high enough elastic limit to store elastic potential energy with high enough energy density.
We will be student will continue to work on the mousetrap cars. Students will continue to work on refining their car's body, wheels / axles and ignition to help the car go faster and farther.
If you have not done this: I would like each group to go to SCHOOLOGY and click on the "Mouse Trap Car" folder. In the folder I want to go to the Discussion. Each group needs to answer the discussion questions.