Question of the day

GeoffCapes

GeoffCapes

Member
Messages
14,000
CatmanV2 said:
Surely if it's just been hit (assuming the truck or train are going in the opposite direction) the velocity of both is zero? ;)

C
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Once hit yes, but both will continue, so whatever is left will still be travelling at the speed of the truck or train. Even though it will be dead. ;)
 
MarkMas

MarkMas

Chief pedant
Messages
8,899
CatmanV2 said:
Surely if it's just been hit (assuming the truck or train are going in the opposite direction) the velocity of both is zero? ;)
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GeoffCapes said:
Once hit yes, but both will continue, so whatever is left will still be travelling at the speed of the truck or train. Even though it will be dead. ;)
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Are you two really suggesting that at the moment the truck hits the swallow, the velocity of the truck briefly goes to zero and then accelerates back up to speed? (Nope)

Or are you merely saying that velocity is unmeasurable (or zero) when the time scale is zero (ie at the instant that the bird and truck collide)? (Because that is nonsense too.)
 
CatmanV2

CatmanV2

Member
Messages
48,730
MarkMas said:
Are you two really suggesting that at the moment the truck hits the swallow, the velocity of the truck briefly goes to zero and then accelerates back up to speed? (Nope)

Or are you merely saying that velocity is unmeasurable (or zero) when the time scale is zero (ie at the instant that the bird and truck collide)? (Because that is nonsense too.)
Click to expand...

Don't go there. Really :lol2:

C
 
Wanderer

Wanderer

Member
Messages
5,791
MarkMas said:
Are you two really suggesting that at the moment the truck hits the swallow, the velocity of the truck briefly goes to zero and then accelerates back up to speed? (Nope)

Or are you merely saying that velocity is unmeasurable (or zero) when the time scale is zero (ie at the instant that the bird and truck collide)? (Because that is nonsense too.)
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Are we talking about the European Swallow or the African Swallow?
 
jonny

jonny

Member
Messages
526
MarkMas said:
Are you two really suggesting that at the moment the truck hits the swallow, the velocity of the truck briefly goes to zero and then accelerates back up to speed? (Nope)

Or are you merely saying that velocity is unmeasurable (or zero) when the time scale is zero (ie at the instant that the bird and truck collide)? (Because that is nonsense too.)
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Velocity as a function of time will be discontinuous at the moment of impact... :p
 
CatmanV2

CatmanV2

Member
Messages
48,730
Given that no one picked a random human for the winner ;)

Based on a stat I just heard: What's the world record for a human to hold their breath.

Closest answer this time tomorrow wins

C
 
CatmanV2

CatmanV2

Member
Messages
48,730
zagatoes30 said:
One of those free divers, maybe 18 minutes
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Little bit early but I'm teaching tonight.

Amazingly (to me) the record for (oxygen assisted, which is hyperventilating in advance) is 22 Minutes and 22 seconds!!!

Even without oxygen assistance it's over 11 minutes!

Over to you, Andy

C
 
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