Physics question

touch said:
mavity doesn't effect terminal velocity, just the acceleration up until terminal velocity.
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What do you think provides that acceleration in most cases? And in this case in particular where it is rolling down a slope?
 
Dis86 said:
What do you think provides that acceleration in most cases? And in this case in particular where it is rolling down a slope?
Click to expand...
mavity is the means to which you arrive at terminal velocity, but the magnitude of the mavity isn't related to the magnitude of the terminal velocity.

edit: may be talking out of my ****
 
assuming you're meaning 1° to the horizontal it'll be much slower than tv as the rolling friction will have a significant mechanical advantage over the horizontal component of mavity, as will the air friction as although it won't be falling down quickly it will be moving sideways quickly and air doesn't care which direction it's being pushed it'll push back.

ie instead of a=mg-Fd it'll be a=mg*sin(1°)-Fd-Fr

or in other words it's 0.017 times the force of mavity having to overcome both air resistance and rolling resistance versus the full force of mavity versus just air resistance.
 
adolf hamster said:
assuming you're meaning 1° to the horizontal it'll be much slower than tv as the rolling friction will have a significant mechanical advantage over the horizontal component of mavity, as will the air friction as although it won't be falling down quickly it will be moving sideways quickly and air doesn't care which direction it's being pushed it'll push back.

ie instead of a=mg-Fd it'll be a=mg*sin(1°)-Fd-Fr

or in other words it's 0.017 times the force of mavity having to overcome both air resistance and rolling resistance versus the full force of mavity versus just air resistance.
Click to expand...

Units error detected
 
touch said:
Acceleration and terminal velocity are unrelated.
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Incorrect. mavity is the means by which an object in freefall reaches any velocity. They are absolutely related.

Just to prove you even more wrong btw...

AjhvTQ.gif


That's right folks, g is the gravitational force!

And from NASA

AjhL7a.gif


Terminal Velocity (mavity and drag)
 
Last edited:
Dis86 said:
Incorrect. mavity is the means by which an object in freefall reaches any velocity. They are absolutely related.
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Some might say there is no such thing as mavity, Just that space, and time, is twisted, perverted and sick! :D

(Cosmology only makes any sense in that brief moment of clarity between the 8th tin of "Spesh" and total oblivion :confused: :p)
 
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