When a constant and sustained upward force acts on a rocket, its acceleration increases mainly because
A)gravity becomes weaker with increased distance.
B)the mass of the rocket decreases as fuel is burned.
C)No way, for acceleration would be constant.

Question

Quizplus · Accepted Answer

According to Newton's second law of motion, force is directly proportional to the mass and acceleration of an object. So, if the mass of the rocket decreases as fuel is burned, the force acting on the rocket remains constant, but the acceleration increases. Therefore, option B is the best choice. Option A is incorrect because the force acting on the rocket is constant, and gravity does not play a significant role in this scenario. Option C is incorrect because the acceleration increases as the mass of the rocket decreases, and the force acting on it remains constant.

When a Constant and Sustained Upward Force Acts on a Rocket