Understanding the Concepts

* Momentum (p): The measure of an object's mass in motion. It's calculated as:

* p = m * v

* where 'm' is mass and 'v' is velocity.

* Velocity (v): The rate of change of an object's position in a specific direction.

Calculations

1. Given:

* Momentum (p) = 45000 kg m/s

* Mass (m) = 200 kg

2. Rearrange the momentum formula to solve for velocity:

* v = p / m

3. Substitute the given values:

* v = 45000 kg m/s / 200 kg

4. Calculate the velocity:

* v = 225 m/s

Answer: The magnitude of the spaceship's velocity is 225 m/s.