Question

a rocket accelerate at a rate of 20m/s. how long does it takes the rocket to reach the velocity of 40m/s​

Answer 1

An acceleration of 0 m/s2 means the velocity does not change between 2 seconds and 3 seconds. Between 0 and 2 seconds the acceleration is +2 m/s2. Between 2 and 3 seconds the acceleration is zero. Between 3 and 6 seconds the acceleration is -3 m/s2.