GKFix MCQ Question

How is the total linear momentum of a system of particles mathematically expressed?

• A. P = (m₁ + m₂ + ... + mₙ)(v₁ + v₂ + ... + vₙ)
• B. P = average velocity × smallest mass
• C. P = sum of masses divided by sum of velocities
• D. P = m₁v₁ + m₂v₂ + ... + mₙvₙ