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Acceleration occurs when an object undergoes Videos
- 1. Apollo 15 Hammer and Feather Drop
- 2. Momentum Problem: Two Objects Colliding (inelastic collision physics / dynamics)
- 3. Understanding the Motion of Centre of Mass of an Isolated System of Particles
- 4. Viridi's coriolis
Apollo 15 Hammer and Feather Drop
At the end of the last Apollo 15 moon walk, Commander David Scott (pictured left) performed a live demonstration for the television cameras. He held out a ...
User Comments
KaimeraPk
commented
on 07 Nov 2015
Clearly 100% fake. At best this was done in a vacuum chamber in America why
else would the background look like a cardboard prop.they borrowed from the
button moon set And why else would they be talking about adding solar wind?
Immortan Joe
commented
on 24 Dec 2015
Then Why would they bother faking it more than once? And spend millions on the the rockets. Just to fake it? Use your brain.
vengencefrom1979
commented
on 18 Jun 2015
one of the first videos I posted, something was itching me back then about
simple physics and 9/11.
Siddarth Iyer
commented
on 21 Jul 2015
Do I detect a string?
Crimzon Crafterz
commented
on 29 Apr 2015
Boring just some old people pretending to be on the moon but on green
screen with space suits
Reptile \o/
commented
on 11 Sep 2015
+aaronbill3Sounds good, let's catch one and see if it works.
aaronbill3
commented
on 10 Sep 2015
+Reptile \o/ to which they would say "but theres only 7 million people in the world" before choking on their own tongue and dying. actually thats not a bad plan.
Reptile \o/
commented
on 10 Sep 2015
+aaronbill3I would say to them that it was around 600 million people all around the world including several of my friends.
aaronbill3
commented
on 10 Sep 2015
+Reptile \o/ and anyone dumb enough to believe that the footage was faked would argue it was recorded later, and people were TOLD that it broadcast in 1969 out of shear desperation for a solid argument without realizing millions of people watched it happen in 1969
Reptile \o/
commented
on 10 Sep 2015
+aaronbill3My response to that would be that it was technicaly impossible to create televized slow motion footage. There is a great video about that:.watch?v=sGXTF6bs1IU
aaronbill3
commented
on 10 Sep 2015
+Reptile \o/ well yeah but I expect 'the footage was slowed down' to be the obvious response to that
Reptile \o/
commented
on 09 Sep 2015
+aaronbill3 Also the hammer falls really slowly compared to Earth.
aaronbill3
commented
on 09 Sep 2015
+tony amato while we HAVE made total vacuums on Earth (for testing space suits, I might add) due to Earth's gravity the feather wouldnt be able to bounce, so...
tony amato
commented
on 28 Aug 2015
actually the only way to make a feather and an hammer fall at the same speed is to eliminate the air the would mean that they were in a gigantic vacuum, sound pretty hard to make, they are on the moon
Momentum Problem: Two Objects Colliding (inelastic collision physics / dynamics)
In this video i discuss what happens when two cars of different mass and same speed but in opposite direction collide. I use the formula mass 1 x velocity 1 ...
User Comments
funlearn
commented
on 01 Jan 2015
@ Vitamins And Mercury - the formula you have used is not correct. It
should be mass 1 x velocity 1 + mass 2 x velocity 2 = mass Total x Velocity
Final. You working is correct as velocity2 is negative (moving in the
negative direction). Anyway, thanks for the good attempt.
A general comment: Momentum remains conserved in case of any collision
(elastic or inelastic). So total momentum before the collision = total
momentum after the collision. For this problem, use this formula keeping
the directions in mind.
Vitamins And Mercury
commented
on 03 Jan 2015
+funlearn i have added an annotation
Vitamins And Mercury
commented
on 03 Jan 2015
+funlearn I understand where you are coming from. It makes me happy that your comments are polite and in depth. So what you are stating is that i should not have skipped the +() part. When ever i see a +() i just short hand it as a -.
funlearn
commented
on 02 Jan 2015
+Vitamins And MercuryThank you for the response. However I beg to disagree with your comments. The equation is correct if you don't mention it as a formula. A formula should be independent of the directions from which the bodies are coming or the directions in which the bodies are moving after the collision. You are using conservation of momentum. So, the 'sum' of the momenta are same before and after the collision. To get the 'sum' you need to 'add'. You have also added one positive momentum with one negative momentum - which is absolutely right. But one should not mention it as a formula. Hope you have got my point. :)
Vitamins And Mercury
commented
on 02 Jan 2015
Thanks for taking the time to comment. The formula is correct for this situation. If both objects were going in the positive direction then the formula you stated above would be correct.
Understanding the Motion of Centre of Mass of an Isolated System of Particles
Motion of Centre of Mass of an Isolated System of Particles We know that there are two kinds of the Motion Translatory motion and Rotatory motion In a ...
Viridi's coriolis
Coriolis effect is an inertial force described by the 19th-century French engineer- Coriolis in 1835. Coriolis showed that, if the ordinary Newtonian laws of motion ...
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