Question

When a rocket is launched, it carries a heavy load of fuel, which is burned during the ascent. The force needed to produce a given acceleration just off the launching pad is F1. The force needed to produce the same acceleration a few minutes after launch is F2. What relationship would F1 and F2 have?

Answer 1

Answer:

F1>F2

Explanation:

The fuel is burning, this means that the total mass of the rocket decreases over time. According to Newton's second law:

$F=ma$

Since acceleration in both moments is the same, the force at time 1 is greater than the force at time 2, since the mass at time 1 is greater than the mass at time 2.