Arocket initially at rest is fired vertically with an upward acceleration of 10 m/s2. at an altitude of 0.50 km, the engine of the rocket cuts off (when the engine os off, it accelerates downwards at approximately 10 m/s). what is the maximum altitude it achieves? how long does it take to reach this altitude from launch?

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Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f

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