buildings like in red faction guerilla

how do i check how much force is being applied? also don't you need a rigidbody to do physics?

yes sir.. you need to rigidbodify your building objects in order to make them under the rules of physics..

what about setting the coordinates of the object at the start and then put a rigidbody on with no gravity or rotation and then every 0.2 seconds it moves back to its original position unless it moved a certain amount and if it did then rotation and gravity get turned on, would that work?

like this

 var startx : float = 0;
 var starty : float = 0;
 var startz : float = 0;
 var breakdistance : float = 0.5;
 var broken = 0;
 
 function Start () {
 startx = transform.x;
 starty = transform.y;
 startz = transform.z;
 Invoke("Loop",0.2);
 }
 
 function Update () {
 if(transform.x >= startx + breakdistance){
 Break();
 }
 if(transform.x <= -startx - breakdistance){
 Break();
 }
 if(transform.y >= starty + breakdistance){
 Break();
 }
 if(transform.y <= -starty - breakdistance){
 Break();
 }
 if(transform.z >= startz + breakdistance){
 Break();
 }
 if(transform.z <= -startz - breakdistance){
 Break();
 }
 }
 
 function Loop () {
 Invoke ("Loop",0.2);
 if(broken == 1){
 transform.x = startx;
 transform.y = starty;
 transform.z = startz;
 }
 }
 
 function Break () {
 broken = 1;
 //rigidbody gravity on
 //rigidbody rotating on
 //what do i put for these?
 }

i got it

 var startx : float = 0;
 var starty : float = 0;
 var startz : float = 0;
 var breakdistance : float = 2.5;
 var broken = 0;
 
 function Start () {
 rigidbody.freezeRotation = true;
 rigidbody.useGravity = false;
 startx = transform.x;
 starty = transform.y;
 startz = transform.z;
 Invoke("Loop",0.5);
 }
 
 function Update () {
 }
 
 function Loop () {
 if(broken == 0){
 Invoke ("Loop",0.5);
 if(transform.x >= startx + breakdistance){
 Break();
 }
 if(transform.x <= -startx - breakdistance){
 Break();
 }
 if(transform.y >= starty + breakdistance){
 Break();
 }
 if(transform.y <= -starty - breakdistance){
 Break();
 }
 if(transform.z >= startz + breakdistance){
 Break();
 }
 if(transform.z <= -startz - breakdistance){
 Break();
 }
 transform.x = startx;
 transform.y = starty;
 transform.z = startz;
 }
 }
 
 function Break () {
 broken = 1;
 rigidbody.useGravity = true;
 rigidbody.freezeRotation = false;
 }