Version: 2017.3
public void AddForce (Vector2 force, ForceMode2D mode= ForceMode2D.Force);


force Components of the force in the X and Y axes.
mode The method used to apply the specified force.


Apply a force to the rigidbody.

The force is specified as two separate components in the X and Y directions (there is no Z direction in 2D physics). The object will be accelerated by the force according to the law force = mass x acceleration - the larger the mass, the greater the force required to accelerate to a given speed.

See Also: AddForceAtPosition, AddTorque, mass, velocity,, AddForce, ForceMode2D.

using UnityEngine;

public class Example : MonoBehaviour { public float thrust; public Rigidbody2D rb;

void Start() { rb = GetComponent<Rigidbody2D>(); }

void FixedUpdate() { rb.AddForce(transform.up * thrust); } }