A 960 kg car initially moving at 30.0 m/s hits a 150-kg deer initially running at 12.0 m/s in the same direction. After the hitting. the deer remains on the car. What is the final velocity (in m/s)?

Respuesta :

Answer:

V = 27.56 m/s

Explanation:

It is given that,

Mass of the car, [tex]m_1=960\ kg[/tex]

Initial speed of the car, [tex]u_1=30\ m/s[/tex]

Mass of the deer,  [tex]m_2=150\ kg[/tex]  

Initial speed of the deer, [tex]u_2=12\ m/s[/tex]

It is mentioned that after the hitting. the deer remains on the car. It is a case of inelastic collision. Let V is the speed of final speed of the deer and the car. Using the conservation of momentum to find it as :

[tex]m_1u_1+m_2u_2=(m_1+m_2)V[/tex]

[tex]V=\dfrac{m_1u_1+m_2u_2}{(m_1+m_2)}[/tex]

[tex]V=\dfrac{960\times 30+150\times 12}{(960+150)}[/tex]

V = 27.56 m/s

So, the final velocity of the deer and the car is 27.56 m/s.