A Test Rocket Is Fired Straight Up from Rest with a Net

question 27

Multiple Choice

A test rocket is fired straight up from rest with a net acceleration of 20.0 m/s².After 4.00 seconds the motor turns off,but the rocket continues to coast upward with no appreciable air resistance.What maximum elevation does the rocket reach?

• A) 487 m
• B) 327 m
• C) 320 m
• D) 408 m
• E) 160 m

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