The value of free fall acceleration is a

# The value of free fall acceleration is a - the earth are...

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The value of free fall acceleration is a = 9.8 m/s 2 . From now on, however, we will denote this value by g , where g is understood to be the constant 9.8 m/s 2 . (Notice that this is not valid at large distances from the surface of the earth: the moon, for instance, does not accelerate towards us at 9.8 m/s 2 .) The equations describing an object moving perpendicular to the surface of
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Unformatted text preview: the earth are now easy to write. If we locate the origin of our coordinates right at the earth's surface, and denote the positive direction as that which points upwards, we find that: x(t) = - gt 2 + v t + x Notice the - sign that arises because the acceleration due to gravity points downwards, while the positive position-direction was chosen to be up....
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## This note was uploaded on 12/03/2011 for the course PHYSICS 010 taught by Professor - during the Fall '09 term at Montgomery.

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