What does a star turn hydrogen into?

Helium

Explanation:

As it glows, hydrogen is converted into helium in the core by nuclear fusion. The core starts to become unstable and it starts to contract. The outer shell of the star, which is still mostly hydrogen, starts to expand. As it expands, it cools and starts to glow red.

the body's situation won't change the forces are equal opposit and on the same body

true tan speed = ang vel x radius