dylankilgore321
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in an automobile crash, a vehicle that was stopped at a red light is rear-ended by another vehicle. The vehicles have the same mass. If the tire marks show that the two vehicles moved after the collision at 4 m/s, what was the speed of the vehicle before the collision

Respuesta :

onyebuchinnaji

The initial speed of the vehicle before the collision is 8 m/s.

  • Let the mass of the vehicle = m
  • Let the initial speed of the vehicle stopped = u
  • The initial speed of the vehicle parked at the red light = 0

Principle of conservation of linear momentum

  • The initial speed of the vehicle before the collision is calculated by applying principle of conservation of linear momentum as follows;

[tex]m_1 u_1 + m_2 u_2 = v(m_1 + m_2)\\\\mu + m(0) = 4(m+ m)\\\\mu = 4(2m)\\\\mu = 8m\\\\u = 8 \ m/s[/tex]

Thus, the initial speed of the vehicle before the collision is 8 m/s.

Learn more about inelastic collision here: https://brainly.com/question/7694106

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