Rotating a cube horizontal axis

Hi,

You should use the physic engine of Unity to reproduce the example. Indeed, you can easily reproduce bounces and inertia of the cube with the physic engine, but it would be a mess to do that with transform operations.

Instead of using transform.Translate(), you must to attach a rigidbody component to the cube. And In the FixedUpdate() function of the script attached to the cube, you could add something like this:

 void FixedUpdate(){
    if(Input.GetAxis("Horizontal") != 0)
   {
       float hAxis = Input.GetAxis("Horizontal");
       Vector3 moveDir = new Vector3(hAxis, 0, 0);
       myRigidBody.velocity = moveDir * movementSpeed * TimefixedDeltaTime;
    }
 }

And after, in the rigidbody component, you can change value of friction, mass, etc, to change the cube behavior.