Physics

Physics

Problem

Which of the following expressions gives the

x

–coordinate of the center of mass for a system of

n

particles located along a straight line? a)

x_{cm}=\dfrac{\sum m_i^{\,2} x_i}{\sum m_i^{\,2}}

b)

x_{cm}=\dfrac{\sum x_i}{n}

c)

x_{cm}=\dfrac{\sum m_i x_i}{\sum m_i}

d)

x_{cm}=\dfrac{\sum \dfrac{x_i}{m_i}}{\sum \dfrac{1}{m_i}}

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