[熱身賽第一輪] 線性動量守恆 [Warm-up Round 1] Conservation of Linear Momentum

unit: Linear Momentum topic: Conservation of Linear Momentum learning objective: Describe the behavior of a system using conservation of linear momentum. essential knowledge: For a collection of objects, the system’s momentum is the vector sum of individual momenta and the velocity of the center of mass is $v_{cm} = \Sigma p_i / \Sigma m_i$.