You may have read or heard the legend of Issac Newton sitting under an apple tree and how he was inspired to develop the law of gravity after an apple fell and hit him on the head. Sometime, these “apples” come our way in life and hit us on the head as a way of getting our attention. Why is this? In physics, the law of gravity can be thought of as an invisible force that pulls objects toward each other. Earth's gravity is what keeps us on the ground and makes things fall. The