5. A test rocket is launched vertically from ground level (y = 0 m), at time t = 0.0 s. The rocket engine provides constant upward acceleration during the burn phase. At the instant of engine burnout, the rocket has risen to 49 m and acquired a velocity of What is the maximum height that the rocket will reach?

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6.

Aracquetball strikes a wall with a speed of 30m/s and rebounds with a speed of26m/s The collision takes20milliseconds.What isthe average acceleration of theball during the collision?

So the only way to answer this question is to give the maximum velocity, which it looks like you didn't copy completely. "acquired a velocity of" is the portion you need to solve this :) BUT! All you need is the kinematic equation for height :) If you can message me the velocity, I will solve it for you.