6
QuizMultiple Choice

Newton's Second Law — Quiz

Question 6 • Physics in the Universe

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?

Answer
A
The acceleration decreases because the mass increases.
B
The acceleration decreases because the mass decreases.
C
The acceleration increases because the mass decreases.
D
The acceleration increases because the mass increases.

Explanation

Newton’s second law is F = ma, so for a constant force, acceleration is a = F/m. As fuel is used, the rocket’s mass decreases; dividing the same force by a smaller mass gives a greater acceleration. Therefore, the acceleration increases because the mass decreases.

AI-written and checked against the verified answer.

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