Asked by Angie

Two trains approach one another. Train A has a mass of 500,00 kg and is moving at 34.0 m/s. Train B has a mass of 350,00 kg and is moving at 42 m/s. They collide and stick together. What is the velocity and direction of the combined masses

Answers

Answered by Damon
A has a mass of 500,00 (I assume you mean 500,000)

A moves east, positive direction
B moved west, negative

Initial momentum east
= 500, 000 *34 - 350,000 * 42

= 170*10^5 - 147*10^5 = 23*10^5

that will be the final too
final mass = 5+3.5 = 8.5*10^5
so
8.5*10^5 V = 23*10^5

V = + 2.71 east
Answered by Angie
what about a 5,000 kg truck rear-ends a 1200 kg car that has been traveling at 13 m/s, causing the truck to slow down and the car to speed up. What is the final velocity?
Answered by Angie
Final velocity of the car that is
Answered by Damon
I do not know.
Questions:
initial velocity of truck?
do they stick together?


Answered by bobpursley
angie, post your own questions, hanging on the tail of other questions wont work.

wondering which one has been traveling at 13m/s? One can't assume conservation of energy here.
Answered by Angie
reposted- sorry for the confusion and thanks of the help
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