Imagine you are sitting under an apple tree, and an apple falls on your head. If your head doesn't hurt too much, you probably will thank your luck and eat the apple. If your head hurts, you will curse the apple tree. According to legend, when the same happened the Newton, he discovered the Law of Gravitation!

We have all experienced Gravity. Without Gravity, if we jumped up, we would never return to the ground! Newton was a genius because he explained Gravity mathematically, and also showed how different phenomena are all connected via Gravity. Let's explore both these aspects in this Chapter.