When traveling by bus, why do fly stay at still on air even when the bus speed changes differently?

Answer 1

The reason is because the fly is very very tiny. When the bus suddenly stops, or starts, or change direction, the change in the bus's momentum immediately affects us, because we, who are inside the bus, haven't change momentum yet continues to move in the original direction, thus we move back and forth or side to side. So the air inside the bus is affected in the same way, but because the air is very light, it isn't affected as much. So the same applies to the fly, which can be either stuck to the walls of the bus or flying in midair inside the bus.

Answer 2

Because the air in the bus moves at the same speed as that of the bus and is therefore stationary with respect to the bus. A fly should not have any problem to stay still although theoritically while the bus changes its speed the air inside presses against the body of the bus in the opposite direction.

Answer 3

This is because the fly is within the bus, so the bus and fly are travelling at a same speed. Fly does not have to do anything to maintain the speed of the bus. The air within the bus takes care of the speed. The relative motion is when the fly is travelling inside the bus that we witness. This is similar to us on the earth. We do not feel the speed of earth travelling across the space but we can see if someone is walking or running at a different speed.

Answer 4

Because the bus, the air within it and the fly are all moving at the same velocity. if the bus suddenly accelerates or decelerates the mass of the fly would react the same way that you would. Of course, if you roll down the windows of the bus so that wind can enter the bus and change the velocity of the air within you change the whole parameter and now have a new ball game. As you can imagine, the fly would likely be blown out the window and torn apart by the high wind velocity. On the other hand, he could simply be blown against the inside of the bus and crushed. Either way, you will be rid of the fly. And that's a good thing.

Answer 5

Do you mean why do flies when they are flying around in a bus not fly forward and hit the windshield when the breaks are pressed?

This is because they are so small and that and they can sense the small force change when the breaks are press that they can overcome the force of the pull by quickly beating there wings in a different direction. Just like you would try to balance if you were standing up in the bus when the breaks where pressed. Also the air in the bus does not move much within the bus. You can see garbage and bottles roll on the floor of the bus when the breaks are pressed but the reason flies don't fly forward and hit the windshield is because they react and change the way they are flying like I said above.

Answer 6

When the bus speed changes, then the fly's flight dynamics do change. But flies can make very rapid corrections to their flight path, and thus it may not be apparent to an observer that such a correction was made. Any time the bus makes an alternation to any constant motion, the air within the bus at first attempts to continue in the original direction but in time will move in the new direction, usually resulting briefly in a slight compression in its initial direction. A fly within the bus will most certainly feel this.

Answer 7

The flight of the fly is in relation with the air inside the bus, not in relation to the outside of the bus.
When the bus slows down or turn, so does the air inside the bus, so does the fly.
I hope this question is from a kid (that would be decent). If it is from an adult, please, sell your computer...

Answer 8

Because the air mass in the bus is not moving relative to the bus.

Answer 9

Because the air is moving along with the bus. So the fly is stationary with respect to that air.

Answer 10

I think the concept that you are asking about is relative motion, there is no relative motion between air that is encapsulated within the bus (and the fly in that air) and the bus itself.