A 2-kg ball is thrown at 3 m/s. What is the ball's momentum?

A. 2 kg m/s

B. 3 kg m/s

C. 6 kg m/s

D. 9 kg m/s

E. none of these

Momentum is mass times velocity. The mass is 2 kg, the velocity is 3 m/s, so the momentum is (2 kg)(3 m/s) = 6 kg m/s.