Final answer:
The magnitude of linear momentum for a 2.0 kg ball moving at 30 m/s speed is 60 kg·m/s.
Step-by-step explanation:
The magnitude of linear momentum of a 2.0 kg ball moving at 30 m/s speed along a straight line can be calculated using the formula p = mv, where p is the momentum, m is the mass, and v is the velocity. In this case, the mass (m) is 2.0 kg and the velocity (v) is 30 m/s. By substituting the given values into the formula, we get p = 2.0 kg × 30 m/s = 60 kg·m/s. Therefore, the answer is D) 60 kgm/s.