Understanding Gravity https://www.youtube.com/watch?v=uw3XdgLyK1YWhen a boy accidentally drops a book from his hand. The book is pulled towards the Earth by the force of gravity. Fig. The book dropped by the boy is pulled towards the Earth The force of gravity on the Earth is caused by a gravitational field around the Earth. The gravitational field is a region in … [Read more...] about Understanding Gravity