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Just Help me in discussing the effects of mass and air resistance to "Gravitational Acceleration". Thanks

2006-11-09 13:53:15 · 4 answers · asked by Anonymous in Science & Mathematics Physics

4 answers

If, by "gravitational acceleration," you mean the acceleration of gravity, g, then the answer is that air resistance has no effect. But you probably mean the acceleration of an object due to gravity. If you drop an object, it accelerates downward, initially with an acceleration of g, ie, 9.81 m/s^2 or 32.2 ft/s^2. But as soon as it is moving, the air striking its surface exerts a force on it that opposes its fall. That force increases with the square of the object's velocity; in other words, if the velocity is, say, 10 m/s, the force on it due to air resistance will be 4 times what it was at 5 m/s. The object will continue to accelerate, but its acceleration will continually decrease. Finally, when the force on it due to air resistance is equal to the force of the gravitational attraction, it will reach a constant velocity. That's what's called "terminal velocity." If there is no air resistance, mass has no effect on the object's acceleration. However, a more massive object will reach a higher terminal velocity than a less massive one, if both experience the same air resistance. In other words, a sphere made of lead will accelerate faster and reach a higher velocity than one made of aluminum, if they're the same diameter and have the same surface properties.

2006-11-09 16:19:52 · answer #1 · answered by pack_rat2 3 · 0 0

mass has not any effects on Gravitational Acceleration by itself.
air resistance reduce Gravitational Acceleration:
F=force exerted by air(resistance )
RESULTANT force on the object = Fr = W - F
a=Fr / m = (W- F)/m = W/m - F/m = g - F/m < g
F depends on volume and speed of the object

2006-11-09 14:03:14 · answer #2 · answered by Ormoz 3 · 0 0

They do not affect the gravitational acceleration. Distance from the center of mass, however, does.

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pack rat is correct. Sorry for steering you wrong if you meant the acceleration DUE to gravity.

2006-11-09 13:57:30 · answer #3 · answered by Anonymous · 0 0

sure if gravity did not impact air debris then it would want to easily drift away into area. also the reason air floats in ecosystem is because air has no certain length or structure. gas debris have very weak holds on them so maximum of that is purely area, it really is why air may be compressed. ultimately gases Oxygen it really is between the 4 states of count number (gas, strong , liquid , and plasma yet purely in chemistry all different places count number 3.

2016-11-28 23:46:47 · answer #4 · answered by ? 4 · 0 0

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