A two-stage missile is fired vertically from rest with an acceleration as shown in the graph. In 15 s the first stage A burns out and the second stage B ignites. How fast is the rocket moving and how far has it gone at t = 20 s? How fast is the missile moving and how far has it gone at t = 20 s?
[A].
v = 430 m/s, s = 4.30 km
[B].
v = 395 m/s, s = 3.69 km
[C].
v = 360 m/s, s = 3.60 km
[D].
v = 500 m/s, s = 5.00 km
Answer: Option D
Explanation:
No answer description available for this question.
