Two cars collide, car one has a mass of 1000Kg and is travelling at 10m/s east to west. Car two has a mass of 1500Kg and is travelling at an unknown velocity west to east. After collision they are both travelling at 2m/s west to east. Calculate the velocity of car two before the collision.

Question

anonymous · Answer

I have been doing this but my answer looks wrong. P=MV p=1000*20=20000. rearrange p=mv to make m=v/p so m=40/20000 = 0.002 this is obviously wrong but I don't know why?

anonymous · Answer

do you have the ans.........

anonymous · Answer

I figured it out im stupid

anonymous · Answer

I rearranged the formula wrong. Im tired lol

anonymous · Answer

For anyone who is looking the answer was 500KG

anonymous · Answer

i thought you wanted the velocity before the collision of the other car

anonymous · Answer

m= mass, v = velocity
m1V1initial+m2V2initial = m1V1final +m2V2final    

think the answer is -3.3 m/s before they collide.

anonymous · Answer

i meant 3.3 m/s

well hope i get a medal for trying! LoL

peace!

anonymous · Answer

Oh thanks it seems the question I asked originally was not the one I was working out lol. Very tired