What is this equation called? Can it work Horizontially as well?

  • Thread starter Tyrion101
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  • #1
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In my most recent math class one of the equations we had to know was -16t2+Tv0+Th0, I may have put the little letters out of order, but that is the basic formula, it has to do with figuring how long it will take something to land, the H being the point at which the projectile was fired/thrown from. I was playing angry birds, and thought it might work sideways as well as vertically? Basically I guess I'm asking if this isn't a horizontal equation, what would it be?
 

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  • #2
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In my most recent math class one of the equations we had to know was -16t2+Tv0+Th0
1. This is NOT an equation. An equation always has the = symbol between two expressions.
2. Your formula is incorrect. It should be h(t) = -16t2 + v0t + h0. There is no time factor with the h0 term, and you shouldn't write both t and T for the same thing. The letter t is usually used to indicate time.

This function gives the height at time t, of an object thrown with an initial velocity of v0 from an initial height of h0.
, I may have put the little letters out of order, but that is the basic formula, it has to do with figuring how long it will take something to land, the H being the point at which the projectile was fired/thrown from. I was playing angry birds, and thought it might work sideways as well as vertically? Basically I guess I'm asking if this isn't a horizontal equation, what would it be?
The function above is strictly the vertical position at a given time. The -16t2 term is the clue there.

To find the position of a ball thrown horizontally or at some angle from the horizontal, you have to break up the velocity vector into its vertical and horizontal components.
 
  • #3
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Gravity does not pull horizontally, does it?
 
  • #4
SteamKing
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And you should be aware that the formula holds true only for one system of units. (Hint: it's not the metric system)
 

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