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mikedamike
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what is a general formula for the gravity acting on an aircraft ?
Thanks in advance
regards
mike
Thanks in advance
regards
mike
mikedamike said:Thank you for reply.
so if iv got this correct the gravity acting on an aircraft would be the same as gravity acting on any other possible object ? which is 9.80665 m/s2 (32.1737 ft/s2)
mikedamike said:The force that keeps the aircraft aloft does not how ever make a change to the gravity acting on it ? it just remains to be 9.80665 m/s2 (32.1737 ft/s2) ?
Thank you for you help
mikedamike said:The force that keeps the aircraft aloft does not how ever make a change to the gravity acting on it ? it just remains to be 9.80665 m/s2 (32.1737 ft/s2) ?
Thank you for you help
hhhmmmm. But a pen dropped from my hand falls on the plane floor. Is the plane + passengers + everything on it an inertial frame?DaveC426913 said:Yes. To be clear, the forces are in balance.
If the plane is in level flight, then the force of gravity is perfectly balanced by the force of lift.
As long as the airplane is flying at a constant altitude, constant speed, yes, it an "inertial frame". The pen would fall from your hand to the floor accelerating at 9.8... m/s^2. (If the plane were accelerating upward [or downward] the pen would have acceleration equal to the sum of 9.8 and the vertical acceleration of the airplane.)Neandethal00 said:hhhmmmm. But a pen dropped from my hand falls on the plane floor. Is the plane + passengers + everything on it an inertial frame?
There is no "balancing" force on the pen- that's why it is accelerating downward. As far as you are concerned, the part of the tower you are standing on gives the balancing, upward, force that you feel as your "weight".This happens as if I climbed a 35000 ft tower and dropped a pen with acceleration=9.8 m/s2 roughly. What is really balanced here? Just curious.
Particularly in lighter than air flying machines!Emilyjoint said:there is a fifth force acting on a plane which usually can be ignored because it is insignificant but it does play a part in some flying machines...buoyancy.
The plane could be climbing or descending at constant speed (no acceleration), and still be in an inertial frame.HallsofIvy said:As long as the airplane is flying at a constant altitude, constant speed, yes, it an "inertial frame".
Gravity acting on aircraft is the force of attraction between the aircraft and the Earth. It is the primary force that keeps the aircraft in the Earth's atmosphere and influences its speed, altitude, and trajectory.
Gravity affects an aircraft's flight by constantly pulling it towards the Earth. This downward force, also known as weight, must be countered by the upward forces of lift and thrust in order for the aircraft to stay in the air and maintain a steady flight.
No, gravity cannot be turned off or manipulated during flight. It is a natural force that is always present and cannot be controlled by the aircraft or its pilot. However, the effects of gravity can be counteracted by other forces, such as lift and thrust, to control the aircraft's movement.
Gravity does not change at different altitudes. However, the strength of gravity can vary slightly depending on factors such as the Earth's rotation, the mass of the Earth, and the altitude of the aircraft. This variation is very small and does not significantly affect the aircraft's flight.
When an aircraft is in a state of freefall, it is accelerating towards the Earth due to the force of gravity. The effects of gravity are not reduced or eliminated, but they are balanced by the inertial forces of the aircraft's movement. This is what allows objects like airplanes and skydivers to experience weightlessness during freefall.