The weight of a substance is defined as its mass divided as its mass divided by its volume true or false

During your summer internship for an aerospace company, you are asked to design a small research rocket. the rocket is to be launched from rest from the earth's surface and is to reach a maximum height of 910 m above the earth's surface. the rocket's engines give the rocket an upward acceleration so it moves with acceleration of 16.0 m/s2 during the time t that they fire. after the engines shut off, the rocket is in free fall. ignore air resistance.

Can someone explain to me how to do this problem ?

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?