# physics

posted by .

a 9000 kg railroad car moving at 3 m/s strikes a stationary 5000 kg railroad car .what is the momentum of the 9000 kg railroad car before the collision?

• physics -

forget the 2nd car.

p = mv
You have m and v.

• physics -

100

## Similar Questions

1. ### physics

A 1.30 × 10 4 kg railroad car moving at 6.70 m/s to the north collides with and sticks to another railroad car of the same mass that is moving in the same direction at 1.83 m/s. What is the velocity of the joined cars after the collision?
2. ### Physics

A 1.46 × 10 4 kg railroad car moving at 7.05 m/s to the north collides with and sticks toanother railroad car of the same mass that is moving in the same direction at 1.76 m/s. What is the velocity of the joined cars after the collision?
3. ### physics

A railroad car of mass 2.7 104 kg moving at 3.50 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at 1.20 m/s. (a) What is the speed of the three coupled …
4. ### physics

A railroad car with a mass of 1.81 104 kg moving at 3.04 m/s joins with two railroad cars already joined together, each with the same mass as the single car and initially moving in the same direction at 1.32 m/s. What is the decrease …
5. ### Physics

A railroad car with a mass of 12000 kg collides and couples with a second car of mass 18000 kg that is initially at rest. The first car is moving with a speed of 9 m/s before collision. If external forces can be ignored, what is the …
6. ### Physics

A railroad car with a mass of 12400 kg collides and couples with a second car of mass 18700 kg that is initially at rest. The first car is moving with a speed of 7.7 m/s prior to the collision. (a) What is the initial momentum of the …
7. ### hw

A railroad car of mass m = 30000 kg moving at v1 = 2.9 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at v2 = 1.711 m/s. What is the magnitude of the …
8. ### Physics

A railroad car with a mass of 1.93 ✕ 104 kg moving at 3.12 m/s joins with two railroad cars already joined together, each with the same mass as the single car and initially moving in the same direction at 1.04 m/s. What is the …
9. ### Physics

As shown in the figure below, cars #1 and #2 are sliding across a horizontal frictionless surface. The cars are equipped with a coupling arrangement similar to the one on railroad cars. Car #1 overtakes car #2 and they have a totally …
10. ### Physics

A 15000 kg railroad car moving 7m/s to the North collides with and sticks to another railroad car of the same mass that is moving the same direction at 1.5 m/s. What type of collision is this?

More Similar Questions