Momentum's Unit from Mass and Velocity

Steps:

• Momentum (p) is defined as mass (m) times velocity (v): p = m × v.
• Mass has SI unit kilograms (kg), velocity has meters per second (m/s).
• Multiply units: kg × (m/s) = kg m/s.
• Newton (N) is kg m/s², so N s = (kg m/s²) × s = kg m/s, matching momentum's unit.

Why C is correct:

• N s equals kg m/s, the SI unit for momentum from p = m v.

Why the others are wrong:

• A: kg m/s² is the unit for force (Newton), not momentum.
• B: Identical to C (N s), but per options, it's a duplicate; momentum uses this unit.
• D: kg m/s is correct but listed separately; C's N s is equivalent.

Final answer: C