What Is Gravity Notes For Science

Gr avity is the for ce that attracts two objects with mass t owards each other . It is ther eason that objects fall t owards the gr ound when dr opped, and it is what k eeps theMoon in orbit ar ound the Earth and the Ear th in orbit around the Sun.Gr avity is a fundamental for ce of nature, and it is one of the four fundamental for ces ofthe univ erse, along with electr omagnetism, the weak nuclear for ce, and the strongnuclear for ce. It is described b y the theory of general relativity , which was de veloped b yAlber t Einstein in the early 20th centur y.Accor ding to the theor y of general relativity , gravity is caused b y the curvatur e ofspace-time, which is the four-dimensional fabric of the univ erse. Mass and energycause space-time t o curve, and this cur vatur e determines the path that objects willfollow as the y move. The amount of cur vatur e is determined b y the mass or ener gy ofthe object causing it, and the mor e massive or energetic the object, the mor e it willcur ve space-time.Gr avity is