How to move a GameObject around with physics

Questions & Answers
1

Hello I have a gameobject that has a Rigidbody2D on it & im also able to move my gameobject around with mouse & touch

private Vector3 offset;

void Update ()
{
    offset = gameObject.transform.position - Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, 0));
}

void onMouseDrag()
{
    Vector3 newPosition = new Vector3(Input.mousePosition.x, Input.mousePosition.y, 0);
    transform.position = Camera.main.ScreenToWorldPoint(newPosition) + offset;
}

but I want to be able to basically throw the game object around the screen (2D) but when I let go of the gameobject it just falls cause gravity is at 1

2

Start here:

Then go here:

3

My guess would be to measure the distance between when you click and when you let off the mouse and divide by time to get force.

So in pseudo-code it would be something like this

float timeHolding;
Vector2 startPosition;
Vector2 endPosition;
float forceToAdd;

onClick()
{
    Time.StartCounting();
    startPosition = yourObject.transform.position;
}

onMouseOff()
{
     timeHolding = Time.StopCounting()  [get the time spent while holding]
     Vector2 endPosition = yourObject.transform.position;
     forceToAdd =((endPosition.x - startPosition.x) + (endPosition.y - startPosition.y)) / time;
     yourObject.RigidBody2D.addForce
          (new Vector2(endPosition.x - startPosition.x, endPosition.y - startPosition.y), forceToAdd);
}

Or something like that I imagine.