# Physics

posted by .

A general question:

if a train goes north at x m/s with a weight of xxxx, and another train goes west at x m/s with a weight of xxxx, they collide and couple together, what direction will they be gonig and at what velocity.

how would you solve this question? thanks.

• Physics -

I have no idea why you are using 4 x's to represent a weight. It appears that the two trains have the same speed and weight.

If that is the case, conservation of momentum will tell you that the final direction is northwest at V = sqrt 2 * x

## Similar Questions

1. ### physics

A red train traveling at 72 km/h and a green train traveling at 144 km/h are headed toward one another along a straight, level track. When they are 950m apart, each engineer sees the other’s train and applies the brakes. The brakes …
2. ### Physics

A train travels 84 km/h when it reaches a slower train 47 meters ahead traveling the same direction at 24 km/h. If the faster train decelerates at 2.1 m/s^2 while the slower train is at a constant speed, when will they collide?
3. ### Physics

A train travels 84 km/h when it reaches a slower train 47 meters ahead traveling the same direction at 24 km/h. If the faster train decelerates at 2.1 m/s^2 while the slower train is at a constant speed, when will they collide?
4. ### Physics

A train travels 84 km/h when it reaches a slower train 47 meters ahead traveling the same direction at 24 km/h. If the faster train decelerates at 2.1 m/s^2 while the slower train is at a constant speed, when will they collide?
5. ### SCIENCE

A TRAIN GOES FORWARD AT A SPEED OF 1M/S FOR 20 SECONDS. THEN IT STOPS AND GOES BACKWARD AT A SPEED OF 0.5M/S FOR 4 SECONDS. AFTER BOTH MOVEMENTS ARE COMPLETED, HOW FAR IS THE TRAIN LOCATED FORM ITS STARTING POINT?
6. ### physics

A train moving with constant velocity travels 190 m north in 12 and an undetermined distance to the west. The speed of the train is 36 m/s. Find the direction of the train's motion relative to north.
7. ### general science

a train goes forward at a speed of 1 m/s for 20 seconds. then it stops and goes backward at a speed of 0.5 m/s for 4 seconds. after both movements are completed, how far is the train located from its starting point.
8. ### Physics

A train moving with constant velocity travels 190 north in 14s and an undetermined distance to the west. The speed of the train is 36m/s. Find the direction of the train's motion relative to north. How far west has the train traveled?
9. ### Algebra 1

Two bullet trains leave the station at the same time traveling in opposite direction. The northbound train goes 125 mph and the southbound train goes 120 mph. After how long will they be 735 miles apart?
10. ### physics

A train with a constant speed of 60km/h goes east for 40 minutes. Then it goes 45◦ north-east for 20 minutes. And finally it goes west for 50 minutes. What is the average velocity of the train?

More Similar Questions