Understanding Momentum

Momentum (p) is a measure of an object's mass in motion. It's calculated by:

* p = mv

Where:

* p = momentum (kg*m/s)

* m = mass (kg)

* v = velocity (m/s)

Solving for Speed

1. We know:

* Momentum (p) = 900 kg*m/s

* Mass (m) = 300 kg

2. Rearrange the momentum formula to solve for velocity (speed):

* v = p / m

3. Plug in the values:

* v = 900 kg*m/s / 300 kg

4. Calculate:

* v = 3 m/s

Answer: The speed of Spaceship 1 (and Spaceship 2, since they have the same mass and momentum) is 3 meters per second.