Asked by M. Malone
Two identical cars hit each other and lock bumpers. If a car moving with a speed of 90km/h approaches a stationary car, what is the speed immediately after coupling cars.
You use and solve for V:
M1V1+M2V2=(M1+M2)V
I end up with the following because my question does not give the mass of the cars, it only states that they are identical, therefore M1=M2. I get:
90km/h=M1*V
What am i doing wrong?
You use and solve for V:
M1V1+M2V2=(M1+M2)V
I end up with the following because my question does not give the mass of the cars, it only states that they are identical, therefore M1=M2. I get:
90km/h=M1*V
What am i doing wrong?
Answers
Answered by
bobpursley
You are not thinking. If M2=M1, then
V1+V2=2V
v= 45km/hr
V1+V2=2V
v= 45km/hr
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