Choose the one alternative that best completes the statement or answers the question. -A test rocket at ground level is fired straight up from rest with a net upward acceleration of

Choose the one alternative that best completes the statement or answers the question.
-A test rocket at ground level is fired straight up from rest with a net upward acceleration of 20 m/s². After 4.0 s, the motor turns off but the rocket continues to coast upward with insignificant air
Resistance. What maximum elevation does the rocket reach?
A) 330 m
B) 320 m
C) 490 m
D) 410 m
E) 160 m

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