For ‘Engineering Week 2019’, we have been learning about different types of engineers and their various roles.
After discovering some really interesting facts, we were tasked with an engineering challenge of our own!
We had to work as an engineer to design and construct a rubber band powered car.
We began by exploring our materials (cardboard, axles, wheels, elastic band, paper clip) and planning our design.
Then we moved onto the construction stage. This involved folding the cardboard into a box shape (also known as a chassis) and fitting the axles through the front and rear holes on the chassis. Next, we had to fit wheels to the end of each axel. Finally, we had to wrap the rubber band around the rear axle and then attach the rubber band to a fixed position on the front axle of the car.
Although we found it rather difficult to fit the rubber bands, we eventually managed to complete the design.
The final part of our challenge required us to test the rubber band car.
To do so ,we hand to wind up the real axle that was attached to the rubber band and then let it go. This caused the car to move forward.
When you wind up the car’s axle you stretch the rubber band and store potential energy. When you release it the rubber band starts to unwind, and the potential energy is converted to kinetic energy as the car is propelled forward.