Understanding Momentum

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

* p = m * v

* Where:

* p = momentum (kg-m/s)

* m = mass (kg)

* v = velocity (m/s)

Solving for Speed

1. Rearrange the formula: To find the velocity (speed), we need to rearrange the momentum formula:

* v = p / m

2. Plug in the values:

* v = 9000 kg-m/s / 300 kg

3. Calculate the speed:

* v = 30 m/s

Therefore, the speed of spaceship 1 is 30 meters per second.