Answer: 20m/s
Explanation:The momentum (p) of an object is given by the product of its mass (m) and velocity (v), i.e., p = mv. We can rearrange this equation to solve for velocity (v), which gives v = p/m.
Substituting the given values, we have:
v = p/m = 18,000 kg-m/s / 900 kg = 20 m/s
Therefore, the object is moving at a speed of 20 meters per second.