Terminal Velocity of Falling Objects Question

[LLogann]

Are we still talking about the original question?

All objects fall at the same rate.  No wind in the MA.  But terminal velocity also depends on mass, shape and Atmospheric Density.

I am unsure if HTC has modeled atmospheric pressure in relation to falling objects. 

NASA has a simplified explanation:
http://www.grc.nasa.gov/WWW/K-12/airplane/termv.html

[Chalenge]

Its probably a good bet that HTC used 59F and a standard atmospheric pressure (29.921 in Hg) so that the density of air would come out in the standard unit for engineering as 0.002378 slugs per cubic foot. And to be absolutely precise the acceleration in American units would be 32.174 ft per sec squared (just to help tidy things up).

Carry on! 

[coola4me]

Wow reading some of these post is making my head hurt haha! You know when you were in school sitting in say a physics class thinking to yourself " I'll never use this information in my lifetime" here's your chance to use that useless information! Dang I need a beer! 

[Wagger]

Just remember the most important factor.  Terminal velocity is severely affected upon impact with the target. Or was it the target is severely affected upon impact at terminal velocity?




  

[bcadoo]

Are we still talking about the original question?

All objects fall at the same rate.  No wind in the MA.  But terminal velocity also depends on mass, shape and Atmospheric Density.

I am unsure if HTC has modeled atmospheric pressure in relation to falling objects. 

NASA has a simplified explanation:
http://www.grc.nasa.gov/WWW/K-12/airplane/termv.html

Incorrect.  If I drop a lead ball and a feather, which one hits the ground first?

They accelerate at the same rate until they reach terminal velocity, where the drag of the object falling through the air is equal to its weight.

[bozon]

the density of air would come out in the standard unit for engineering as 0.002378 slugs per cubic foot.

What kind of an engineer measures density in units of mass of slimy snails per volume of a deformed foot? 

[Chalenge]

What kind of an engineer measures density in units of mass of slimy snails per volume of a deformed foot?  

You know my whole life I have waited for the first stupid question and I think you must have worked all of two minutes on that one! 

[mechanic]

is it about 120mph for a falling object from a static drop? So something to due with airspeed and drop angle calculated with normal TV of earths atmosphere.

But i was wondering if the fastest the bomb would be is when it is dropped, as this may be as high as 500mph. So is the bomb decelrating the whole time? (i didnt read the whole thread so forgive me if its been suggested.)

[bozon]

But i was wondering if the fastest the bomb would be is when it is dropped, as this may be as high as 500mph. So is the bomb decelrating the whole time? (i didnt read the whole thread so forgive me if its been suggested.)

It really depends on the design of the bomb. For most, making a big crater is not the desired effect and if they employ an impact detonation, a very high speed on impact is not desirable. Bombs designed for penetration are designed with a higher terminal speed. The 7-10 ton concussion bombs carried by the lancs were meant to dig deep into the ground before exploding. For this reason they were dropped from enough altitude to reach the terminal velocity which was very high (I am sorry I, don't want to quote wrong numbers).

[VonMessa]

is it about 120mph for a falling object from a static drop? So something to due with airspeed and drop angle calculated with normal TV of earths atmosphere.

But i was wondering if the fastest the bomb would be is when it is dropped, as this may be as high as 500mph. So is the bomb decelrating the whole time? (i didnt read the whole thread so forgive me if its been suggested.)

No. The bomb would be at it's slowest when it is first dropped

The bomb would be accelerating the whole time until it reaches its <drum roll, please>  Terminal Velocity.  

That is, of course, if the bomb in question is dropped from a high enough altitude for it to reach its potential terminal velocity.

The following equation (and the values of the variables) are all that is needed to determine terminal velocity.  Nothing less, nothing more.



The only thing that will be affected by any other variables not included in the above equation such as angle of drop, etc, is the
TIME IT WILL TAKE to REACH it's terminal velocity.