Hi, Have tried googling this, but have yet to find the definitive answer. In Year 6 we conduct the classic 'spinners' experiment where the children alter a variable and see how this affects the time it takes for a paper spinner to reach the ground when dropped from a set height. Typically the children alter the width of the spinner blades, type of material etc. One of the variables that always get picked is weight of the spinner, altered by adjusting the number of paperclips attached to the base of the spinner. Invariably every year the children's results show that the heavier the spinner, the faster it falls (all other variables being the same). This fits with the intuitive idea that heavier objects fall faster. However my understanding is that this should NOT be the case, as two objects that generate the same amount of air resistance should fall at the same rate, regardless of their weight. Is this not what Galileo demonstrated? If this is the case then what is going on with our spinners? It tends to make it doubly difficult to convince the kids that Galileo was correct when their own scientific experiment seems to prove the exact opposite! Grateful for any advice.