Question

Four objects are situated along the y axis as follows: a 1.98-kg object is at +2.99 m, a 2.99-kg object is at +2.57 m, a 2.44-kg object is at the origin, and a 3.92-kg object is at -0.492 m. Where is the center of mass of these objects?

Answer 1

\[y_{cm}=\frac{1}{M}\sum_{i=1}^4 m_iy_i=m_1y_1+m_2y_2+m_3y_3+m_4y_4\]
where \[M=\sum_im_i=m_1+m_2+m_3+m_4\]
plug in your values