it keep going 30 mph in one spot or would it go faster in the car and go crazy?
2007-01-26 13:41:00 · 6 answers · asked by Z of L of U 2 in Science & Mathematics ➔ Physics
A duck moves forward by pushing air backwards, behind it. Forces acting on the duck are
Thrust - forward motion, from the wings
Lift - upward force, from the wings
Drag - friction, reverse motion, we could say
Gravity - downward force.
The duck achieves flight by using the first two forces to counter the last two. Drag is caused by air moving into the wings. When the duck enters the car, the forward motion from the air ceases (the air is still in the car), and the duck would very quickly find itself speeding up until drag became powerful enough to slow it down again. Wouldn't be pretty.
Think of a car on the highway, driving behind a semi truck. Both vehicles are moving at 60 mph. If the back door of the semi's trailer opens, and the car is able to drive inside, what happens if the car does not reduce its speed? Does the car have to keep its speed to stay in the trailer? Nope. The car now has a new frame of reference for its motion, just like the duck does.
2007-01-26 21:18:22 · answer #1 · answered by The Ry-Guy 5 · 0⤊ 0⤋
The air inside the vehicle is traveling at 30 MPH.
The duck is flying forward at 30 MPH - it seems reasonable that the simple additions of velocity would apply - if the duck maintained his forward momentum, it would slam into the windshield at 30 MPH (the vehicle would still be going 30 MPH, so relative to the road, the poor duck would be going 60 MPH!
2007-01-26 14:18:34 · answer #2 · answered by LeAnne 7 · 0⤊ 0⤋
The duck would keep going 30 mph in one spot.
2007-01-26 13:50:33 · answer #3 · answered by Gary D 1 · 0⤊ 0⤋
It would stay going at thirty mph, but it could then sit down in a seat and the force of the cars momentum would propel it at the cars velocity and it could take a rest
2007-01-26 13:47:26 · answer #4 · answered by Slibuntu 2 · 0⤊ 0⤋
The duck is working hard flying. As soon as it flew in the car window, as long as it were flapping its wings, it would start to accelerate through the air in the car and fly toward the dashboard. If it STOPPED flapping its wings as soon as it entered the car, it would simply fall on the seat and rest.
2007-01-26 13:51:07 · answer #5 · answered by firefly 6 · 0⤊ 0⤋
There would be all sorts of weird air currents at the interface to the car's (moving) air.
The duck would lose lift, but could probably handle it instinctively.
I would say it depends on what the duck was expecting.
2007-01-26 14:05:59 · answer #6 · answered by J C 5 · 0⤊ 0⤋