Suppose a clay model of a koala bear has a mass of 0.250 kg and slides on ice at a speed of 0.700 m/s. It runs into another clay model, which is initially motionless and has a mass of 0.325 kg. Both being soft clay, they naturally stick together. What is their final velocity (in m/s)

Respuesta :

Answer:

The final velocity of the system is 0.304 m/s.

Explanation:

Given that,

Mass of the 1 clay model, [tex]m_1=0.25\ kg[/tex]

Mass of the second clay model, [tex]m_2=0.325\ kg[/tex]

Initial speed of the first clay model, [tex]u_1=0.7\ m/s[/tex]

Initial speed of the second clay model, [tex]u_2=0[/tex] (at rest)

Both being soft clay, they naturally stick together. It is a case of inelastic collision. The momentum of the system remains conserved such that :

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

V is the final velocity of the system

[tex]V=\dfrac{m_1u_1}{(m_1+m_2)}\\\\V=\dfrac{0.25\times 0.7}{(0.25+0.325)}\\\\V=0.304\ m/s[/tex]

So, the final velocity of the system is 0.304 m/s. Hence, this is the required solution.