3 years ago

Why did scientists compare megalodons and great white sharks? SCIENCE

Physics

1 answer:

GenaCL600 [577]3 years ago

4 0

They have similar growth trajectories

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2 years ago

What molecular geometry would be expected for f2 and hf?

Kaylis [27]

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2 years ago

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2 years ago

Sulfur hexafluoride is represented by which formula? A) sf2 b) sf7 c) s2f5 d) sf6

Margarita [4]

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3 years ago

Read 2 more answers

A 12000 kg railroad car is traveling at a 2 m/s when it strikes another 10000 kg railroad is at rest. If the car lock together w

zimovet [89]

The final speed is $1.09m\frac{m}{s}$

Why?

To calculate the final speed, we need to know that we are working with an inelastic collision, it means that both bodies stick together after the colission. We can calculate the final speed of the bodies (if exists) using the following equation:

$m_{1}v{1}+m_{2}v_{2}=(m_{1}+m_{2})v_{f}$

We are given the following information:

$m_{1}=12000kg\\v_{1}=2\frac{m}{s}\\m_{2}=10000kg\\v_{2}=0\frac{m}{s}(at rest)$

So, substituting and calculating, we have:

$m_{1}v{1}+m_{2}v_{2}=(m_{1}+m_{2})v_{f}\\\\12000kg*2\frac{m}{s}+10000kg*0\frac{m}{s}=(12000kg+10000kg)*v_{f}\\\\v_{f}=\frac{24000\frac{kg.m}{s} }{22000kg}=1.09m\frac{m}{s}$

Hence, the final speed is 1.09 m/s.

Have a nice day!

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3 years ago