Here's how to calculate the momentum of the particle:

Formula:

Momentum (p) = mass (m) × velocity (v)

Given:

* Mass (m) = 28 kg

* Velocity (v) = 7.8 m/s

Calculation:

p = 28 kg × 7.8 m/s

p = 218.4 kg m/s

Answer: The momentum of the particle is 218.4 kg m/s.