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February 11th, 2005, 10:10
| #1 |
| Senior Member  Join Date: Jan 2004 Location: Minneapolis, MN
Posts: 922
   |  Jump Puzzle time: If you were standing in the aisle of an airliner and jumped up for a second or two (assuming there was enough headroom to do so), then would you land on the same spot, or somewhere aft of your "lift-off" spot due to the aircraft moving from underneath you? |
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February 11th, 2005, 10:16
| #2 |
| Moderator  Join Date: May 2003 Location: GRR
Posts: 8,483
| Re: Jump Same spot. You start out with the same forward velocity as the plane, and there is nothing to slow you down while you are "in the air", since the air inside the plane has the same forward movement. You will continue your forward movement right along with the plane. (All assuming steady-state flight. Be a different story if the plane was still picking up speed. Or slowing down for that matter.) Don't try this in an open cockpit plane.... |
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February 11th, 2005, 15:33
| #3 |
| Old Skool  Join Date: Nov 2002 Location: Mid-Atlantic, KMRB
Posts: 1,925
| Re: Jump Taking physics this semester? |
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February 11th, 2005, 18:54
| #4 |
| Senior Member  Join Date: Dec 2003 Location: Fresno, CA
Posts: 912
| Re: Jump Now for a follow-up question: while you are in the air, is the airplane lighter than when you were standing on the floor? |
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February 11th, 2005, 21:15
| #5 |
| Senior Member  Join Date: Feb 2004 Location: Peterborough, NH
Posts: 1,271
| Re: Jump [ QUOTE ] Now for a follow-up question: while you are in the air, is the airplane lighter than when you were standing on the floor? [/ QUOTE ] Ahhh making my head spin  I can go either way... One - you are still part of the mass that is being carried inside the cabin, hence the the total mass hasn't changed... BUT if you think about weight (Mass x Gravity) when you are no longer being held to the plane's deck while you are in the air your weight isn't included in the plane's weight. It's kinda like when you do a 0 G push over... technically the plane Weighs 0 Lbs but still has the same mass. Ahh head still spinning after typing that |
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February 12th, 2005, 08:37
| #6 |
| Senior Member  Join Date: Jan 2005 Location: Bossier City, Louisiana
Posts: 591
| Re: Jump [ QUOTE ] Same spot. You start out with the same forward velocity as the plane, and there is nothing to slow you down while you are "in the air", since the air inside the plane has the same forward movement. You will continue your forward movement right along with the plane. (All assuming steady-state flight. Be a different story if the plane was still picking up speed. Or slowing down for that matter.) Don't try this in an open cockpit plane.... [/ QUOTE ] Nor should you try it by jumping out of a moving car to see if you will still be next to the car when you hit the ground! But this will put you in line for a Darwin award. Especially if the now driverless car swerves to the left and runs over you! |
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