In science class we learned about forces and friction. We saw Bill Nye The Science Guy on our IWB. He knows a lot about friction. We made card propellers (helicopters) and investigated how they worked when we dropped them from a height. We added weights (paperclips) The extra weight made the propellers spin faster. We used a large size propeller and a mini propeller. The mini one worked best, it spun really fast with two paper clips as weight. . It was good fun working with forces and friction. Here are some photos …
