We build a hammer today. The hammer is used to punch the nail into the gear, by which we can feel what the friction is and how different friction in different gear. Students first built a Lego hammer, which can be used to mimic the nail drive. They conducted the experiment to observe how many times are needed to hit the axis into the anvil. During the experiment, the students need to change the cam wheel position, so the potential energy of the hammer varies thus the kinetics energy. The STEM information behind this section is the energy transformation between the potential and kinetics energy as well as friction forces. All the students finished the model building part and did the experiment with different level. They enjoyed this section. After that, some of them change their hammer to a car or some hammer car or car hammer…. LOL what a great idea!
Tutor Paul
