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anonymous
 4 years ago
An arrow is shot straight up in the air at an initial speed of 15.0 m/s. After how much time is the arrow moving downward at a speed of 8.00 m/s?
anonymous
 4 years ago
An arrow is shot straight up in the air at an initial speed of 15.0 m/s. After how much time is the arrow moving downward at a speed of 8.00 m/s?

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0final velocity = 0 0 = 15 + (9.8)(t) t = 1.53 s That is only to go up. Coming down, initial velocity = 0 final velocity = 8 a = 9.8 t = (80)/9.8 =0.816s Add them up = 2.346s

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Alright quick questions, when I am working out the downward time I am getting a negitive number. Does that just indicate the direction of movement like with acceleration?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0gravity! set it's direction right.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Time will ALWAYS be positive, no matter what. You need to cancel out the ve signs using acceleration and velocity.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Ok so when i'm going down gravity is positive then if i'm fighting gravity its negitve correct?

TuringTest
 4 years ago
Best ResponseYou've already chosen the best response.0You can define either direction as positive so long as you are consistent in your work

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Yes. That is how most people learn it.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Awesome guys thanks a ton!
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