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## 1. On the planet Microid, trains that run on air tracks much like the air track you used in lab are the principle means of transportation. A

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1. On the planet Microid, trains that run on air tracks much like the air track you used in lab are the principle means of transportation. A train car with a mass of 6300 kg is traveling at 12.0 m/s when it strikes a second car moving in the same direction at 2.2 m/s. The two stick together and move off with a speed of 4.00 m/s. What is the mass of the second car? Explain your reasoning. (10 pts) 2. How much kinetic energy was lost in the collision? (10 pts)

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Physics
2 months
2021-07-29T10:24:46+00:00
2021-07-29T10:24:46+00:00 1 Answers
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## Answers ( )

Answer:a) the mass of the second car = 28000 kg

b) the amount of kinetic energy that was lost in the collision =

Explanation:Given that:

mass of the train car = 6300 kg

speed of the train car = 12.0 m/s

mass of the second moving car = ???

speed of the second moving car = 2.2 m/s

After strike;

they both move with a speed = 4.00 m/s

a)

Using the conservation of momentum :

b)

To determine the amount of kinetic energy that was lost in the collision;

we will need to find the difference between the kinetic energy before the collision and after the collision;

i.e

Now; the kinetic energy that was lost in the collision is calculated as follows: