Asked by Axel

Hi, i really need help with this question.

Two identical cars hit each other and lock bumpers. A car moving with a speed of 90 km/h approaches a stationary car
Answered by bobpursley
and what is the question?

You cannot use conservation of energy here, only conservation of momentum.
Answered by Axel
The question is: two identical cars hit each other and lock bumpers. If a car moving with a speed of 90km/h appraoches a stationary car, what is the speed immediately after coupling cars.
Answered by bobpursley
M1V1+M2V2=(M1+M2)V
solve for V
Answered by Axel
Thank you that was bothering me for so long.
Answered by Axel
In the problem, the mass isn't known though, you know that the one car is identical to the other though. i end up getting,

90km/h=M1*V

What do I do after that?
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