A Rocket Is Launched from the Origin with an Acceleration

question 3

Multiple Choice

A rocket is launched from the origin with an acceleration of 20.0 m/s² at an angle of 30.0 degrees above the horizontal.The launch acceleration lasts for 2.00 seconds at which time the fuel is exhausted.The rocket then falls with an acceleration of 9.80 m/s² downward.What is the time it takes to reach maximum height?

• A) 3.22 s
• B) 3.87 s
• C) 6.08 s
• D) 4.75 s
• E) 5.12 s