# physics

posted by .

Two trains face each other on adjacent tracks. They are initially at rest, and their front ends are 50 m apart. The train on the left accelerates rightward at 1.05 m/s2. The train on the right accelerates leftward at 0.93 m/s2.
(a) How far does the train on the left travel before the front ends of the trains pass?
(b) If the trains are each 150 m in length, how long after the start are they completely past one another, assuming their accelerations are constant?

• physics -

The distance covered is 50 m, so let the rightmost train go x meters, the left goes 50-x m in the same time...

x=1/2 aright*time^2
50-x=1/2 aleft*time^2

divide the equations

x/(50-x)=aright/aleft

solve for x (right), and 50-x (left)

b. now, the distance apart the ends starts at 350m.

one goes y, the other 350-y
solve it again, only this part find the time.

## Similar Questions

1. ### Physics AP C

Two trains, each having a speed of 22 km/h, are headed at each other on the same straight track. A bird that can fly 60 km/h flies off the front of one train when they are 70 km apart and heads directly for the other train. On reaching …
2. ### physicsURGENT!!!!!!

Two trains face each other on adjacent tracks. They are initially at rest, and their front ends are 50 m apart. The train on the left accelerates rightward at 1.05 m/s2. The train on the right accelerates leftward at 0.93 m/s2. (a) …
3. ### physicsHELP!!!

Two trains face each other on adjacent tracks. They are initially at rest, and their front ends are 50 m apart. The train on the left accelerates rightward at 1.05 m/s2. The train on the right accelerates leftward at 0.93 m/s2. (a) …
4. ### Math

An eastbound train and a westbound train meet each other on parallel tracks heading in opposite directions. The eastbound train travels 12 miles per hour faster than the westbound train. After 1.5 hours, they are 174 miles apart. At …
5. ### math

A northbound train and a southbound train meet each other on parallel tracks heading in opposite directions. The northbound train travels 12 miles per hour faster than the southbound train. After 2.5 hours, they are 330 miles apart. …
6. ### physics

Two trains face each other on adjacent tracks. They are initially at rest, and their front ends are 36 m apart. The train on the left accelerates rightward at 1.11 m/s2. The train on the right accelerates leftward at 1.17 m/s2. How …
7. ### physics

Two trains face each other on adjacent tracks. They are initially at rest, and their front ends are 34 m apart. The train on the left accelerates rightward at 1.18 m/s2. The train on the right accelerates leftward at 1.19 m/s2. (a) …
8. ### Physics

Two trains face each other on adjacent tracks. They are initially at rest, and their front ends are 30 m apart. The train on the left accelerates rightward at 1.17 m/s^2. The train on the right accelerates leftward at 1.1 m/s^2. (a) …
9. ### Physics

Two passenger trains are passing each other on adjacent tracks. Train A is moving east with a speed of 35.5 m/s, and train B is traveling west with a speed of 33.4 m/s. (a) What is the velocity (taking due east to be the positive direction) …
10. ### Physics

Two trains are running on parallel tracks., train A is faster than B.There is a box on each train of identical nature. But mass of box in train A is more than that of train B. If box is changed between the trains, what happens to speed …

More Similar Questions