# pysc

a locomotive of mass 15000kg traveling at 2.5m/s collides and couples with a set of rail carts of mass 7000kg.calculate:
1.the combined velocity of the train and carts after impact
2.the loss in kinetic energy in the collision

1. 👍 0
2. 👎 0
3. 👁 221
1. What is your school subject? If you want an expert in that subject, please type the full name of the subject in the School Subject box.

1. 👍 0
2. 👎 0
👩‍🏫
Ms. Sue
2. Now this time you told me the collision is inelastic, they stick together.
Therefore we have one mass of 22,000 kg after collision.
I assume the carts were stationary before the crash.
Initial momentum=
15,000*2.5 + 0 = 37,500 kg m/s
= final momentum = 22,000 v
so
v = 1.68 m/s

initial Ke = (1/2) (15,000)(2.5)^2
final Ke = (1/2)(22,000)(1.68)^2

subtract the final from the initial to find the loss in the heat of collision

1. 👍 0
2. 👎 0

## Similar Questions

1. ### physics

A locomotive is pulling 17 freight cars, each of which is loaded with the same amount of weight. The mass of each freight car (with its load) is 37,000 kg. If the train is accelerating at 0.7 m/s2 on a level track, what is the

2. ### Physics

When a high-speed passenger train traveling at 161 km/h rounds a bend,the engineer is shocked to see that a locomotive has improperly entered onto the track from a siding and is a distance(D)= 676m ahead.The locomotive is moving

3. ### Physics

The rolling resistance for steel on steel is quite low; the coefficient of rolling friction is typically μr=0.002. Suppose a 180,000 kg locomotive is rolling at 19 m/s on level rails. A) If the engineer disengages the engine, how

4. ### Statistics

An important measure of the performance of a locomotive is its "adhesion," which is the locomotive's pulling force as a multiple of its weight. The adhesion of one 4400-horsepower diesel locomotive model varies in actual use

1. ### Statistics

An important measure of the performance of a locomotive is its "adhesion," which is the locomotive's pulling force as a multiple of its weight. The adhesion of one 4400-horsepower diesel locomotive model varies in actual use

2. ### Physics

A car of mass m moving at a speed v1 collides and couples with the back of a truck of mass 3m moving initially in the same direction as the car at a lower speed v2. (Use any variable or symbol stated above as necessary.) (b) What

3. ### Statistics

An important measure of the performance of a locomotive is its "adhesion," which is the locomotive's pulling force as a multiple of its weight. The adhesion of one 4400-horsepower diesel locomotive model varies in actual use

4. ### Physics

A car with a mass of 1700 kg is traveling directly northeast (45 degrees between north and east) at a speed of 14m/s (31mph), and collides with a smaller car with a mass of 1300kg that is traveling directly south at a speed of

1. ### Science

1. Why is California’s high-speed rail such a groundbreaking effort? 2. Why will it take so long to complete the high-speed rail route? 3.Should other states wait to see if the high-speed rail system works well before starting

2. ### physics

A locomotive pulls a series of wagons. Which is the correct analysis of the situation? A. because action always equals the reaction,the locomotive cannot pull the wagons,-the wagons pull backward just as hard as the locomotive

3. ### 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

4. ### Physics

A locomotive creates a 59400 force which creates an acceleration of 0.145 m/s. What is the mass of the locomotive