Cloth.externalAcceleration

Description

A constant, external acceleration applied to the cloth.

Use this to simulate constant forces on the cloth, such as wind waving a flag. See Also: Cloth.randomAcceleration.

using UnityEngine;

public class Example : MonoBehaviour
{
    // Make this cloth fall at half speed (if is affected by gravity).
    void Start()
    {
        GetComponent<Cloth>().externalAcceleration =  -Physics.gravity / 2;
    }
}