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  • 27-02-2019
  • Mathematics
contestada

If the flare is launched with an initial velocity of 144 feet per second, find the height after 2 seconds. The answer is not 288!

Respuesta :

Ashraf82
Ashraf82 Ashraf82
  • 10-03-2019

Answer:

The height = 223.6 ft

Step-by-step explanation:

∵ Initial velocity (u) = 144 ft/sec

∵ t = 2 sec

∵ a = - 32.2 ft/sec²

∵ h = ut + 1/2 at²

∴ h = 144(2) +1/2 (-32.2 × 4) = 288 + 1/2( -128.8) = 223.6 ft

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