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A Free Falling Body

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Posted by Tim on April 17, 2003 04:02:04 UTC

has inertia, but not weight or weight = 0.

if one applies a force to a free falling body that object will resist a change in the motion that it is already making.

for inertial force f=kma

for gravitation force f=kmg

g is just the acceleration constant associated with a massive object.

hence in general we can set kma=kmg

cancelling k & m we have a=g

accelertion reguired in a inertial force is the same as the acceleration required in a gravitational force.

this in essence is the principle of equivalence exponded by Einstein.

it is a result of the proportionality of gravitational mass and inertial mass.

regards tim

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