A 360 kg roller coaster car traveling at 18 m/s collides inelastically with a stationary 240 kg car on a section of a horizontal track. To what maximum height, h, do the combined cars travel before rolling back down the hill?
"m_1v=(m_1+m_2)u\\implies\\\\\nu=\\frac{m_1v}{m_1+m_2},"
"\\frac{(m_1+m_2)u^2}{2}=(m_1+m_2)gh\\implies\\\\\nh=\\frac{u^2}{2g}=\\frac{m_1^2v^2}{2(m_1+m_2)^2g}=5.9~m."
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