Question

in the 1960s nasa designed a rocket (the sea dragon) to be launched from under water. the rocket was never built, but lets imagine it was. at some point as the rocket rises, it hits sea level (elevation: 0 meters). thats when we start our stopwatch. lets assume that in the first seconds the rockets elevation is changing at a rate of 15 m/s. the rate is because the rocket is

Explanation:

Step1: Identify the rate - concept

The rate of change of elevation (15 m/s) is a positive value.

Step2: Relate to motion

Since the rocket is rising (going upwards), the elevation is increasing. A positive rate of change of elevation means the rocket is moving upwards.

Answer:

positive; rising