Rigidbody velocity has got different direction than VelocityChange force vector

Questions & Answers
1

I want my GameObject to move to direction +y direction with a constant speed.

I chose to apply VelocityChange type fordce to a rigidbody.
The force applied: (0,10,0)
The Rigidbody properties: mass of 1, Use Gravity: false, Is Kinematic: false.

public class moveForward : MonoBehaviour 
{	
	public Vector3 force;
	
	void Start () 
		{
			print("v0: " + GetComponent<Rigidbody>().velocity);
		
			GetComponent<Rigidbody>().AddForce(force,ForceMode.VelocityChange);
		
			print("f: " + force);
	}
	
	int fuCounter = 0

	void FixedUpdate()
	{
		if(0==(fuCounter%50))
		{			
			print("v: " + GetComponent<Rigidbody>().velocity);
		}
		++fuCounter;
	}
}

My expectation was that I measure a velocity which equals the velocity vector I added, namely (0,10,0).
Instead I got (0.0, 9.0, -1.1).

v0: (0.0, 0.0, 0.0)

f: (0.0, 10.0, 0.0)

v: (0.0, 0.0, 0.0)

v: (0.0, 9.0, -1.1)

v: (0.0, 9.0, -1.1)

…

The force and velocity vector do not point into the same direction:

83000-20161128.png

What is the reason of this difference?

2

I managed to get rid of the problem. I disabled the collider of the plane, which I forgot to do before. Now it works fine.