A Test Rocket at Ground Level Is Fired Straight Up

question 8

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)160 m
• B)330 m
• C)320 m
• D)410 m
• E)490 m

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