in real life free fall will involve air resistance as eventually the free falling object will reach terminal velocity when downward forces are balanced by upward frictional force.
Free fall means specifically that gravity and gravity alone is the only force that is considered significant.
This does not necessarily mean no air drag (as in only a condition for an absolute evacuated airless environment)...it just means that it isn't worth one's efforts to consider air drag.
If air drag IS somehow significant, or buoyancy or the normal force, or friction, or a tension force, or whaterver...
THEN IT IS DISQUALIFIED AS FREE FALL.
You then need to resort back to Newton's second law and add up all the forces and divide by mass to find what a will replace g...or if a even is constant or rather a function of position or time or velocity perhaps.
Free fall is an occurrence wherein the only force acting on the body/object is the pull of gravity and nothing more... It means that there is no air resistance... this is for our calculations to be more simplified... in real life situations, we can also include air resistance for falling objects, but your free fall equations should be revised to account for this force...
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Only in simple theoretical problems.
in real life free fall will involve air resistance as eventually the free falling object will reach terminal velocity when downward forces are balanced by upward frictional force.
Free fall means specifically that gravity and gravity alone is the only force that is considered significant.
This does not necessarily mean no air drag (as in only a condition for an absolute evacuated airless environment)...it just means that it isn't worth one's efforts to consider air drag.
If air drag IS somehow significant, or buoyancy or the normal force, or friction, or a tension force, or whaterver...
THEN IT IS DISQUALIFIED AS FREE FALL.
You then need to resort back to Newton's second law and add up all the forces and divide by mass to find what a will replace g...or if a even is constant or rather a function of position or time or velocity perhaps.
Free fall is an occurrence wherein the only force acting on the body/object is the pull of gravity and nothing more... It means that there is no air resistance... this is for our calculations to be more simplified... in real life situations, we can also include air resistance for falling objects, but your free fall equations should be revised to account for this force...
Free fall formulas are based on the assumption that no force other than that of gravity is acting on the body during its fall.
Drag due air resistance is therefore neglected to keep it simple.
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RE:
physics, does free fall means no air resistance?
thanks
Free Fall means that object is under the influence of Gravitation ALONE>>> but it does NOT mean air resistance is not there.........
hope u understood.......
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