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xxYingxYangxx7670
23.10.2019 •
Physics
Train cars are coupled together by being bumped into one another. suppose two loaded train cars are moving toward one another, the first having a mass of 140,000 kg and a velocity of 0.300 m/s, and the second having a mass of 95,000 kg and a velocity of −0.120 m/s. (the minus indicates direction of motion.) what is their final velocity (in m/s)?
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Ответ:
The final velocity of the two train cars is 0.13 m/s.
Explanation:
Given that,
Mass of the first car,![m_1=14000\ kg](/tpl/images/0343/4421/21c41.png)
Mass of the second car,![m_2=95000\ kg](/tpl/images/0343/4421/25c15.png)
Initial speed of first car,![u_1=0.3\ m/s](/tpl/images/0343/4421/9ca10.png)
Initial speed of second car,![u_2=-0.12\ m/s](/tpl/images/0343/4421/7154b.png)
It is mentioned that two train cars are coupled together by being bumped into one another. So, it is a case of inelastic collision. Momentum will remain conserved here. Using the conservation of linear momentum we get :
V is the final speed of two cars.
So, the final velocity of the two train cars is 0.13 m/s. Hence, this is the required solution.
Ответ:
Explanation:
c sorry im so sorry