Final answer:
The momentum of a 0.5 kg soccer ball kicked at an initial velocity of 20 m/s is 10 kg·m/s, which corresponds to answer option C.
Step-by-step explanation:
To calculate the momentum of an object, you use the formula momentum (p) = mass (m) × velocity (v). For the soccer ball with a mass of 0.5 kg that is kicked at an initial velocity of 20 m/s, you would multiply mass by velocity to get the momentum.
Therefore, the calculation would be:
p = m × v
p = 0.5 kg × 20 m/s
p = 10 kg·m/s
The correct answer is C) 10 kg·m/s.