Question: What is the momentum of a 3 kg object moving at 4 m/s?

Options:

1. 12 kg·m/s
2. 7 kg·m/s
3. 15 kg·m/s
4. 10 kg·m/s

Correct Answer: 12 kg·m/s

Solution:

Momentum p = mv = 3 kg * 4 m/s = 12 kg·m/s.