Answer the Chief’s questions
1) For how many seconds did the
fuel last for?
17 seconds .
The rocket starts to slow down under the influence of gravity as soon as
the fuel has been used up.
2) How many seconds after launch
did the rocket reach peak altitude?
Peak altitude is reached at 25 seconds after launch.
The rocket momentarily comes to a stop
as it changes direction and starts its descent.
3) How long did the rocket take
to return back to earth?
The rocket returns back to Earth when the speed reaches
0 for the second time. This occurs at 45 seconds.
4) Did the parachutes open or
did the rocket crash?
The parachutes opened at 34 seconds at
which point the speed of descent was abruptly decreased to 10m/s.
5) At what speed did the rocket
return back to earth?
10m/s
6) Between 15 and 25 seconds
the rocket is decelerating. What force/s cause the deceleration?
Gravity is acting on the rocket to slow it down.
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Rocket
engineer

Tests of a new rocket engine
are conducted. The rocket is launched straight up and data collected by
computers and displayed as graphs. As the engineer in charge of evaluating
the new engine, you are handed a graph of speed versus time. You take
the graph and go into the office of the chief engineer to discuss the
results. 
Answer the Chief’s questions 1) For how many seconds did the fuel last for?
2) How many seconds after launch did the rocket reach peak altitude?
3) How long did the rocket take to return back to earth?
4) Did the parachutes open or did the rocket crash?
5) At what speed did the rocket return back to earth?
6) Between 15 and 25 seconds the rocket is decelerating. What force/s cause the deceleration?
