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Air Resisitance
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by Hamtaro0803
on 2010-08-06 00:50:07
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| Force = Air Resistance? Under what condition? |
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Re: Air Resisitance
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by
on 2010-08-06 09:50:44 |
When an object is moving quickly through the air, and no other external forces are applied. 
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Re: Air Resisitance
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by angel_of_stone
on 2010-08-06 13:47:56 (edited 2010-08-06 13:48:27)
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Force equals air resistance (drag) when an object hits terminal velocity. That is the point when the object is unable to gain anymore velocity. Fdrag=1/2p * v2 * A * C Where p is the density of the fluid, v is the velocity of the object, A is the reference area perpendicular to the direction of travel, and C is the drag coefficient. At a certain point, the force due to acceleration will equal the force due to drag. At this point, the only way to move faster is to increase the rate of acceleration.
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Re: Air Resisitance
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by
on 2011-03-07 23:43:48 |
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I disagree with Stoney . When a body reaches its terminal velocity , net force is zero ,it is not equal to air drag . Net force is equal to air resistance only when the body is projected in a gravity free space containing only air . ( NOTE :Even in this condition , there is a very minute fore of attraction due to the air molecules , but it can be neglected.) |