Cat.cs

using UnityEngine;

public class Cat : MonoBehaviour
{
    [SerializeField] GameObject left;
    [SerializeField] GameObject right;

    [SerializeField] float radius;
    [SerializeField] float velocity;
    [SerializeField] float theta;

    void Start()
    {
        left.transform.Rotate(0f, 0f, -theta);
        right.transform.Rotate(0f, 0f, theta);
    }

    void Update()
    {
        var v = -velocity * Mathf.Cos(theta * Mathf.Deg2Rad);

        transform.Rotate(velocity / radius * Mathf.Rad2Deg * Time.deltaTime, 0f, 0f);
        left.transform.Rotate(v / radius * Mathf.Rad2Deg * Time.deltaTime, 0f, 0f);
        right.transform.Rotate(v / radius * Mathf.Rad2Deg * Time.deltaTime, 0f, 0f);
    }
}