How to stop object from moving afterits get Acceleration from ForceMode.Acceleration

Unity Engine
1

Hello,
I have one problem.
I use ForceMode.Acceleration to get my ship flying around with acceleration, but I dont know how to stop it immediately when I stop pressing “w” key on keyboard or “s” key for reverseThrust. How can I stop my ship immediately?

Here is the code:

using UnityEngine;
    using System.Collections;
     
    public class MyShip : MonoBehaviour {

public string keyTurnLeft;
public string keyTurnRight;
public string keyThrust;
public string keyReverseThrust;
public string keyFire;

public float thrustTurnPower;
public float thrustPower;



void Update ()
{
	if(Input.GetKey(keyTurnLeft))
	{
		rigidbody.AddTorque(Vector3.up * -thrustTurnPower, ForceMode.Acceleration);
	}
	
	else if(Input.GetKey(keyTurnRight))
	{
		rigidbody.AddTorque(Vector3.up * thrustTurnPower, ForceMode.Acceleration);
	}
	
	else
	{
		rigidbody.angularVelocity = Vector3.zero;
	}
	
	if(Input.GetKeyDown(keyThrust))
	{
		
		rigidbody.AddForce(transform.forward * thrustPower, ForceMode.Acceleration);
	}
	
	else if(Input.GetKey(keyReverseThrust))
	{
		
		rigidbody.AddForce(transform.forward * -thrustPower, ForceMode.Acceleration);
	}
	}
}
2

You should put your physics in FixedUpdate method/function… to stop, you should only have to set the rigidbody.velocity to zero.