Free Fall 3.4
Almost everyone knows that all objects, when dropped, fall towards the Earth with almost constant acceleration, in this respect there is a legend that was Galileo who discovered that fact to note that two different weights being dropped simultaneously from the Leaning Tower of Pisa hit the ground almost simultaneously.
So if an elephant and an ant is dropped from a building, they fall at the same time?, If there is resistance from the air, it was possible, but as if the elephant has to wait a bit of time to reach the ant.
Without air resistance air resistance
With acceleration of free fall is denoted by the symbol g. The value of g on earth decreases with altitude. Also, there are slight variations of g with latitude. The free-fall acceleration is directed toward the center of the Earth. On the surface, the value of gravity is about 9.80 m/s2.
a Body Freefall
An object thrown upward and one downward expermientarán released the same acceleration that an object is dropped from rest. Once they are in freefall, all objects have a downward acceleration equal to the acceleration of free fall.
If neglected air resistance and assume that free-fall acceleration altitude does not vary with b, then the vertical motion of a freely falling object is equivalent to motion with constant acceleration. Therefore, you can apply the kinematic equations for constant acceleration.
order to apply these equations take the vertical direction and y axis indicate positive upward, and with these coordinates is possible to replace x by y. In addition, as positive upward, the acceleration is negative (downward) and is given by a =-g. With these substitutions, one obtains the following equations: Equation
Information provided by
equation v = vo - gt
speed as a function of time.
and-me = ½ (v + vo) t
displacement as a function of speed and time.
and-me = vot - ½ gt2
displacement as a function of a body decayed
Free l time.
v2 = vo2 - 2g (y-yo)
speed as a function of desplzamiento.
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