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When a model rocket is launched, the propellant burns for a few seconds, accelerating the rocket upward. After burnout, the rocket coasts upward for a
When a model rocket is launched, the propellant burns for a few seconds, accelerating the rocket upward. After burnout, the rocket coasts upward for a while and then begins to fall. A small explosive charge pops out a parachute shortly after the rocket starts down. The parachute slows the rocket to keep it from breaking when it lands. The graph below shows the velocity data (NOT the position data) from the flight of the model rocket. 200 150 100 Velocity (fi/sec) 50 -50 - 100 2 4 8 10 12 Time after launch (sec) Answer each of the following questions based on this graph. 2 points Was the rocket going up or down 5 seconds after it launched? How do you know? O The rocket was going up because its velocity is positive at t = 5 seconds O The rocket was going up because its velocity is negative at t . 5 seconds. O The rocket was going down because its velocity is positive att = 5 seconds. O The rocket was going down because its velocity is negative att = 5 seconds. Clear my selection 2 2 points Approximately how high up was the rocket when it reached its highest point? 190 ft O 380 ft O 104 ft 52 f Clear my selection 3 2 points When was the acceleration constant? What was its value then (to the nearest integer)? O Between 2 seconds and 10.8 seconds; 32 ft/s O Between 2 seconds and 10.8 seconds; -32 ft/s2 Between O and 2 seconds; 95 ft/s Between O and 2 seconds; -95 ft/s Clear my selection 2 points Estimate the average velocity of the rocket over the first 8 seconds. 73 ft/'s 28 ft/'s O 109 ft/'s O 131 ft/'s Clear my selection 5 2 points Estimate the average acceleration of the rocket over the first 8 seconds. 127 ft/s O 63 ft/5 2 O -24 ft/52 O Oft/$ 2 Clear my selection 6 2 points Estimate the displacement of the rocket between 6 and 10 seconds. O -60 f Oft 60 ft O 120 ft Clear my selection 2 points Estimate the total distance traveled by the rocket between 6 and 10 seconds. O -60 f Oft 60 ft O 120 ft Clear my selection
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