Question

A rocket experiences a constant force even as the amount of fuel in its fuel tanks decreases. What happens to the acceleration of the rocket as it runs out of fuel?

The acceleration decreases because the mass increases.
The acceleration increases because the mass increases.
The acceleration decreases because the mass decreases.
The acceleration increases because the mass decreases.

Answer 1

The acceleration increases because the mass decreases.

Reason: F = ma, so with constant force F and decreasing mass m, a = F/m grows as m gets smaller.