friction and terminal velocity of a parachutist vs a car

[raaaid]

according what im studying if you drop a block in a ramp and the block moves it does it in an ACELERATED fashion

come on it calls to the common sense it will very soon reach terminal velocity and that at that low speeds wont be due to the wind resistance

so dynamic force of friction in surface= MU* normal force is FALSE

what i wonder is if it is a typical neglection or just a wrong conceptualization

[ACE-OF-ACES]

Originally Posted by raaaid

according what im studying

You said art classes right? If so I recomend you stick to it!

[raaaid]

yes definitly my 1st try is gonna make my living out of art

my plan is selling painted figure by ten-15 euro

check out some:









and my favourite:

notice how the music syncs perfectly

http://www.youtube.com/watch?v=AZtkh...ure=plpp_video

the thing is that theres litle offer on painted sculptures on ebay

[SEE]

Raaid, "conservation of Energy' laws apply - E=1/2MVsquared, Potential energy, kinetic energy, etc, all apply. That block will lose energy for a whole bunch of reasons as it slides down (useful energy being converted into other and unwanted energy forms) but at any point the energy sum must always be equal to the starting energy before you dropped it onto the ramp.

[raaaid]

hey i agree with conservation of energy since it implies conservation of info

every though you have gets carved in the universe

i just say f of f= mu* normal is wrong

[bongodriver]

Originally Posted by raaaid

oh havent you noticed my patience? you need that to deal with kids

i never get annoyed however much attacked

i have a degree in english filology but really what capacitates me for that is my inherited patience

Philology.....

[bongodriver]

can you sculpt a 'troll face' ?

[5./JG27.Farber]

Poor Raid, shot down more times on the forum than in the game...

Is this supposed to be Yoda?

http://i40.photobucket.com/albums/e2...Imagen0101.jpg

It was the image you used in you sig for sometime but I thought it was something you had gotten from a kinder egg or something... because the picture was small.

[WTE_Galway]

Actually if you manage to drop a car and a parachutist simultaneously off the Leaning Tower of Pisa without getting caught by the Polizia they will hit at roughly the same time. This is because the tower is not high enough for the parachutist to accelerate to a high enough speed for the parachute to inflate. Unfortunate for the parachutist.

This is the dangerous bit of base jumping. When exiting an aircraft the aircraft forward velocity is sufficient to inflate the chute so if need be you can deploy instantly. When base jumping you need to fall quite a ways before your chute will inflate.

Now .... what would make it interesting is if you drove a car off a short cliff (such as the edge of a gravel quarry) of a similar height to the Leaning Tower of Pisaand had a parachutist leap out at speed. I would leave this experiment for professionals like the mythbusters, it could be dangerous at home.

[WTE_Galway]

Oh .. and some questions for Raaid to research ...

- do spinning objects actually fall slower ?

- do they fall slower even in a vacuum ?

- if you spin them fast enough can they even hover or go up?