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Veronika [31]
3 years ago
10

When you have a straight horizontal line on a velocity time graph, what does this tell you about the object’s motion in terms of

velocity and acceleration?
Physics
1 answer:
stira [4]3 years ago
5 0

Answer:

It tell you that the velocity is constant, what means that there's no acceleration

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v = 27 m/s

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To find the speed of cars after the collision  you take into account the momentum conservation law. Total momentum of both cars before the collision must be equal to the total momentum of both cars after the collision.

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m_1v_1+m_2v_2=(m_1+m_2)v   (1)

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v2: speed of the car before the collision = 0 m/s (it is  at rest)

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v=\frac{m_1v_1+m_2v_2}{m_1+m_2}

Next, you replace the values of the rest of the variables:

v=\frac{(3000kg)(45m/s)+0kgm/s}{3000kg+2000kg}=27\frac{m}{s}

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