Understanding Momentum

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

* p = m * v

* where:

* m = mass (kg)

* v = velocity (m/s)

Solving for Velocity

1. Rearrange the momentum equation to solve for velocity:

* v = p / m

2. Plug in the given values:

* v = 900 kg m/s / 150 kg

3. Calculate the velocity:

* v = 6 m/s

Answer: The speed of Spaceship 1 (and Spaceship 2 since they have the same mass and momentum) is 6 m/s.