Saturday, August 7, 2010

In which of the following cases would you feel weightless?

In which of the following cases would you feel weightless?


while falling from a roof


while traveling through space in an accelerating rocket


while falling from an airplane with your parachute open


while walking on the Moon


none of the aboveIn which of the following cases would you feel weightless?
none of the aboveIn which of the following cases would you feel weightless?
The answer is none.


All the options involve an acceleration.


Gravity is an acceleration - the weight we feel is due to the Earth's surface stopping us from moving in response to the acceleration of gravity.
falling from a roof.





in an accelerating rocket you would be pushed towards the back.





with the parachute you wouldnt be in a free fall


on the moon the gravity is about 1/6 of the earth. so while you would feel very light, you wouldnt be weightless
While falling from a roof.
I would say none of the above. Surely you woud have the force of air resistance battering you, so you wouldn't feel completely weightless. You would probably feel less weightless as the fall goes on. The faster you fall, the greater the air resistance and the more resistance to your motion you would feel.
Falling off the roof. Ouch!!





Your feeling of weightlessness would be followed by the feeling of a broken arm or worse.
NONE!





However if you get on a swing-- for about a fraction of a second you are weightless at the TOP of the SWING--- just before you start back down. You sort of ';float'; off of the seat--- this can also be done for short periods of time in an aircraft-- see this link:


http://www.gozerog.com/
walking on tha moon of cause

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