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 two-stage missile is fired vertically from rest with an accelerati

1.	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» C. v = 360 m/s, s = 3.60 km

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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?

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