anonymous
  • anonymous
Please help! Will fan & medal!! A model rocket is launched from the ground with an initial velocity of 288 ft/sec. How long will it take the rocket to reach its maximum height? Show all work in the space provided.
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
welshfella
  • welshfella
to do this youy use one of the equations for constant acceleration the acceleration in this case is that due to gravity which = 32 ft s-2 in this case we use -32 bacause it is acting against the motion of the rocket
welshfella
  • welshfella
use the formula v = u + at At maximum height the velocity v = 0 , a the acceleration = -32 , the initial velocity = 288 ft/sec and t is the required time solve for t

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welshfella
  • welshfella
initial velocity = u
anonymous
  • anonymous
Is it 9?
welshfella
  • welshfella
so just plug those values into the formula
welshfella
  • welshfella
0 = 288 -32t 32t = 288 t = 9 seconds yes
anonymous
  • anonymous
Thank you! You helped explained it good. Could I ask another question? I'll make sure to close this one.
welshfella
  • welshfella
ok

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