hi, i was just wondering... if a heavy truck collides with a lighter vehicle, and both are travelling at the SAME speed, would the force of impact be: the SAME for both vehicles, greater on the lighter car, or would the vehicles experience no force at all? thank you in advance for your help! *edit* hi cepheid... sorry but I'm new at the whole physics forum thing... But i have already narrowed the answers to the question down to those three choices (though I doubt option three is the answer!)... and think that the answer could be option two... because the lighter vehicle has less mass.