Clearing out an objects force when trying to teleport it.

I am currently writing some logic that after the game has finished I want to reset all of our current game objects back to their starting locations. I can get the objects to get teleported back to their correct starting locations but it seems after the game countdown and I reenable their activity they will thrust forward. Or in what ever direction they were heading when I teleported it. Is there a way to clear an objects force?

This is how I am teleporting my object.

playerObject.transform.position = startingPosition.transform.position;
playerObject.transform.rotation = startingPosition.transform.rotation;

To clear forces you need to set rigidbody.velocity and rigidbody.angularVelocity to zero.

rigidbody.velocity = Vector3.zero;
rigidbody.angularVelocity = Vector3.zero;

If you forget about angular velocity then objects will continue rotating.

Do they have rigidbodies attached to them and are you manipulating their velocity/adding force to them in any way? If so, just set their velocity to Vector3.zero like so:

rigidbody.velocity = Vector3.zero;

If you’re manipulating their position without use of rigidbodies, then it must have something to do with your system.

You can use change your velocity with:
rigidbody.velocity = Vector3.zero;
But you might want to destroy and re-instantiate your object with:
Destroy (gameObject);
Instantiate (prefab, Vector3.zero, Quaternion.identity);