Question

1. how do you describe the movement of objects with periodic motion?

an object which alternates between two different cycles.
an object which moves in a random cycle around a fixed point.
an object which moves in a repeating cycle around a fixed point.
an object which changes cycles every period.

Explanation:

Periodic motion is defined as motion that repeats at regular intervals, following the same cycle around a fixed reference point. The other options are incorrect: periodic motion does not involve random cycles, alternating different cycles, or changing cycles per period.

Answer:

An object which moves in a repeating cycle around a fixed point.