Answer:
acceleration = 15.8 m/s^2
Step-by-step explanation:
Weight of rocket which acts downward is W = mass × acceleration due to gravity
w = 30.9 × 9.81
W = 303.129 N
force of 790 N acts upward and it is greater than W hence acceleration is in upward direction and is given by Newton's second law of motion as
790 - W = mass × acceleration
790 - 303.129 = 30.9 × acceleration
486.871 = 30.9 × acceleration
acceleration = 486.871 / 30.9
acceleration = 15.756 m/s^2
acceleration = 15.8 m/s^2