A Test Rocket at Ground Level Is Fired Straight Up

question 421

Multiple Choice

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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