Problem / bug with Velocity and Unity 5.3?

Hi,

I have a very weird behavior with Unity 5.3.4: the velocity does not seem to follow the physics laws...

I am trying to simulate a trajectory for an object, but the object never reach the exact destination.

First one: we launch the object by setting the velocity:

Code (CSharp):

1.  Vector3 shootDir = Quaternion.Euler (-50.59f, 0, 0) * Vector3.forward;
2. force = shootDir * 10;
3. GoToLaunch.transform.GetComponent<Rigidbody> ().velocity = force;

I made a little test by assigning those 2 scripts to 2 different game objects:


2nd object: we compute the trajectory following the physics rules:

Code (CSharp):

1. float timer;
2. float force;
3.  
4. void Start(){
5.    timer = Time.time;
6.   Vector3 shootDir = Quaternion.Euler (-50.59f, 0, 0) * Vector3.forward;
7. force = shootDir * 10;
8. }
9.  
10. void Update(){
11.      float t = Time.time - timer; //timer = Time.time, in Start()
12.      transform.position = force * t + Physics.gravity * t * t * 0.5f;
13. }
14.  

The 2 spheres should follow the same path, but it's not the case.



Is this a bug? or is there something I am missing?