Answer:
The acceleration of the spacecraft is 16,367.62 miles/hr²
Step-by-step explanation:
Given;
thrust of the spacecraft, F = 5.31 x 10⁶ N
mass of the spacecraft, m = 5,760,000 lbm = 2612692.051 kg
The acceleration of the spacecraft in m/s² is given by Newton's second law of motion;
F = ma
a = F / m

The acceleration in miles per hour square is given by;

Therefore, the acceleration of the spacecraft is 16,367.62 miles/hr²