anonymous
  • anonymous
Britney throws an object into the air with an initial vertical velocity of 27 ft/s from a platform that is 10 ft above the ground. About how long will it take the object to hit the ground? A. 1 s b. 2 s c. 3 s d. 4 s
Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
@mathmate
mathmate
  • mathmate
@yayah2001 Are you on energy conservation or kinematics? Both will solve the problem, but it's better to work with the one you're studying.
anonymous
  • anonymous
conservation

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More answers

anonymous
  • anonymous
this is math!
mathmate
  • mathmate
So you're on calculus?
anonymous
  • anonymous
algebra
mathmate
  • mathmate
Do you have the kinematics equation given to you? like: x(t)=vt+(1/2)at^2
anonymous
  • anonymous
I have h(t)=-4.9t^2 + VoT +Ho
mathmate
  • mathmate
x(t)=-10 v=+27 a=-32.2 Solve for t.
mathmate
  • mathmate
That is assuming the ball was thrown vertically \(upwards\)
mathmate
  • mathmate
and reject the negative root from the quadratic equation.
mathmate
  • mathmate
That's the same equation, but the number -4.9 should read -16 or -16.1, because you are working with feet, not metres.
anonymous
  • anonymous
okay, I understand now.
anonymous
  • anonymous
or not
mathmate
  • mathmate
Take your time and post the answer to check if you wish. Please give me the answer to 2 places of decimals, even though you have to round it to an integer later on. Remember to reject the negative root.
anonymous
  • anonymous
I have to change it to a different question because I got a 70%
mathmate
  • mathmate
ok, anyway, the principle is the same.
anonymous
  • anonymous
I really just need the answer. I've tried really hard to get the equation right (I spent 10 minutes on just the one question), so could you possibly go easy on me?
anonymous
  • anonymous
with the new question, of course.

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