Question

1. which example describes rotational motion?

the movement of a rocket that is launched at an angle of 15°
the movement of the sun around the black hole in the center of our galaxy
the movement of the main rotor of a helicopter as it flies
the movement of a hockey puck as it slides around the outside of an ice rink

Explanation:

Rotational motion is when an object spins around an internal axis. The helicopter's main rotor rotates around its central shaft (internal axis). The rocket follows projectile motion, the sun orbits an external black hole (orbital motion), and the hockey puck has translational/circular motion around an external point, not spinning on its own internal axis.

Answer:

the movement of the main rotor of a helicopter as it flies