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Search: Posts Made By: Fraser
Forum: X ///M Forum 05-04-2010, 04:38 AM
Replies: 121
Views: 19,525
Posted By Fraser
No matter how short the fall, the heavier X5...

No matter how short the fall, the heavier X5 (assuming everything else is equal) will hit the bottom first.
Forum: X ///M Forum 05-03-2010, 02:10 AM
Replies: 121
Views: 19,525
Posted By Fraser
I have no idea how high our cliff has to be for...

I have no idea how high our cliff has to be for our falling X5s to achieve their terminal velocity. However, the heavier X5 in question (the one with all the big guys in it) will also accelerate...
Forum: X ///M Forum 05-02-2010, 09:24 PM
Replies: 121
Views: 19,525
Posted By Fraser
I'm sure that Wikipedia is right on this...

I'm sure that Wikipedia is right on this occasion. Easier to post that link that upload page images of the physics book that I still have from old university days which has the same basic explanation...
Forum: X ///M Forum 05-02-2010, 08:32 PM
Replies: 121
Views: 19,525
Posted By Fraser
Assuming that the two X5s in question have the...

Assuming that the two X5s in question have the same aerodynamic drag but one is heavier because of all the extra people inside, the heavier one will have a higher terminal velocity. Therefore if the...
Forum: X ///M Forum 05-02-2010, 07:42 PM
Replies: 121
Views: 19,525
Posted By Fraser
StanF18: Provided the cliff is high enough for...

StanF18: Provided the cliff is high enough for the two objects in question to reach their respective terminal velocities, the heavier object would reach the ground first provided the aero factors...
Forum: X ///M Forum 05-01-2010, 08:44 PM
Replies: 121
Views: 19,525
Posted By Fraser
That is true provided everything else (ie aero...

That is true provided everything else (ie aero drag and the density of the medium through which the object is falling) is equal.
Forum: X ///M Forum 05-01-2010, 07:59 PM
Replies: 121
Views: 19,525
Posted By Fraser
Won't happen unless you are free falling in a...

Won't happen unless you are free falling in a perfect vacuum. With freefall through the air you will reach a terminal velocity which is dependent on the density of air, the aerodynamic drag on the...
Forum: X ///M Forum 05-01-2010, 03:48 AM
Replies: 121
Views: 19,525
Posted By Fraser
I know that where the discussion started but it...

I know that where the discussion started but it evolved beyond that. StanF18 suggested "FORGET the mass...and the weight...M and W don't apply to the velocity in TT Bear's "X falling off a cliff" ". ...
Forum: X ///M Forum 05-01-2010, 02:49 AM
Replies: 121
Views: 19,525
Posted By Fraser
Nice argument JCL but you are avoiding the key...

Nice argument JCL but you are avoiding the key question; ie does weight play a part in free-fall. You have argued for the negative for reasons I can't understand. You know better than that.

PS:...
Forum: X ///M Forum 05-01-2010, 01:25 AM
Replies: 121
Views: 19,525
Posted By Fraser
Regardless of X5s of any variety falling off...

Regardless of X5s of any variety falling off cliffs, mass plays a part in the terminal velocity of a free-falling object.
Forum: X ///M Forum 05-01-2010, 12:32 AM
Replies: 121
Views: 19,525
Posted By Fraser
Think about this. Two objects. One is a large and...

Think about this. Two objects. One is a large and very fine bird feather. The other is a moulding of that same feather made from lead. Same shape, same cross-sectional area, same cd. When you drop...
Forum: X ///M Forum 04-30-2010, 09:50 PM
Replies: 121
Views: 19,525
Posted By Fraser
Not right. When an object is in free fall through...

Not right. When an object is in free fall through the atmosphere there are two forces at work. One is the gravitational pull between the earth and the object (trying to speed things up) and the other...
Showing results 1 to 12 of 12

 
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