Internal and External Forces

The Grade 7’s from Mr. Lieberman’s and Ms. Khairi’s classes have been learning about internal and external forces, their interactions with structures and their structural components. They were tasked to build a bridge at least 30 cm long and 10 cm high with a maximum of 150 Popsicle sticks. They were only allowed to use glue. With limited resources and construction parameters, their bridges still had to support at least 15 science textbooks. Some exceeded structural expectations!