text: if a car runs with a speed" v" for a period of time " t"what will be the run distance when v=0,i need equation   if you plot it in graph form, you are saying that the car has run with speed v for the period of time t. so it has covered distance vt. (newtons laws of motion). so after running the distance vt, if the v=0, then distance covered is vt  you have to use the formula s=ut+ 0.5at*t  i agree with skinut's opinion, but the qns can be interpreted in two different ways... there might be circumstances when the initial speed might be v. and then the final speed in 0. if you know the laws motion, the distance in this case will be vt. but i think skinut's answer is right for the current case. and i that case the asker really needs  help.