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If a ball of mass 1 kg rolls with a speed of 2 m/s toward another ball of mass 1.5 kg at rest, what would be their combined speed if they stick together after colliding?

Respuesta :

Answer:

[tex]V=0.8\;\;m/s[/tex]

Explanation:

Given,

Mass of first ball  [tex]m_1=1\; kg[/tex]

Mass of second ball [tex]m_2=1.5\;kg[/tex]

Initial speed of the first ball [tex]u_1=2\;m/s[/tex]

The second ball is initially at rest. So,  by the conservation of momentum

[tex]p_i=p_f\\m_1u_1+m_2u_2=(m_1+m_2)V\\1\times2+1.5\times0=(1+1.5)V\\V=0.8\;\;m/s[/tex]

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