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It doesn't. Well, it might in some particular problem, but you'd have to be a lot more specific.

The equation for position might have a "-16t2" term in it, indicating that the object is in a 1g gravitational field and the units being used are "feet per second per second".

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12y ago
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7mo ago

In physics problems involving free-fall motion, the initial velocity of an object when released from rest at a height is considered to be 0. The negative sign in -16x^2 comes from the acceleration due to gravity, which is commonly approximated as -9.8 m/s^2. Multiplying this by 2 gives -16 m/s^2, the coefficient used in equations involving free-fall motion.

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Q: Why does velocity start with -16x squared?
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