anonymous
  • anonymous
A model rocket is launched from the ground with an initial velocity of 352 ft/sec. How long will it take the rocket to reach its maximum height? Show all work in the space provided.
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
welshfella
  • welshfella
use one of the equations for motion at constant acceleration initial velocity u = 352, acceleration a = -32, v = 0 and s = distance so we use v^2 = u^2 + 2as solve for s
anonymous
  • anonymous
10.9 seconds? @welshfella

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welshfella
  • welshfella
??? - the answer is a distance - there is no time involved in this formula
anonymous
  • anonymous
It says how long does it take to reach it's maximum height
welshfella
  • welshfella
oh ! sorry - i misread the question use the v = u + at 0 = 352 - 32t
welshfella
  • welshfella
t = 352/32 = ?
anonymous
  • anonymous
11 seconds. @welshfella
welshfella
  • welshfella
right on
anonymous
  • anonymous
Thanks :)
welshfella
  • welshfella
yw

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