Answer:
Step-by-step explanation:
Comment
A: Gravity always pulls downward towards (to keep it simple) the earth's center. The answer is not A.
C: If you are interested in upward motion, Friction is not going to be the answer. What will the rocket rub against to make it go up?
D: Centripetal Force has to do with circular motion, The rocket generally is not thought of as going in a circle. Not D.
Answer: B. A chemical reaction can be directed so the energy will force an upward motion.
