X_{com} = \frac{x_{1}m_{1} + x_{2}m_{2} + ... + x_{N}m_{N}}{m_{1} + m_{2} + ... + m_{N}}

Y_{com} = \frac{y_{1}m_{1} + y_{2}m_{2} + ... + y_{N}m_{N}}{m_{1} + m_{2} + ... + m_{N}}

X_{com} = \frac{∑ x_{i}m_{i}}{∑ m_{i}}

Y_{com} = \frac{∑ y_{i}m_{i}}{∑ m_{i}}

Z_{com} = \frac{∑ z_{i}m_{i}}{∑ m_{i}}

X_{com} = \frac{∑ x_{i}m_{i}}{M}

Y_{com} = \frac{∑ y_{i}m_{i}}{M}

Z_{com} = \frac{∑ z_{i}m_{i}}{M}

(MX_{com}, MY_{com}, MZ_{com}) = (∑ x_{i}m_{i}, ∑ y_{i}m_{i}, ∑ z_{i}m_{i})

MV_{x} = ∑ v_{i}m_{i}

p⃗ = mv⃗

p⃗_{tot} = ∑ p⃗_{i} = ∑ m_{i}v⃗_{i}