It has weight-- but not lift. It also has no thrust nor drag. It needs forward movement/trust, velocity, and lift to get off the ground.
Gravity on the plane itself, the weight of any occupants (force of gravity on occupants), and any force applied by weather influences such as wind.
"Normal" forces push up on a still car. In this case, normal forces are equal in magnitude but opposite in direction to the gravitational forces pushing down on the still car.
The would be balanced forces.
Newtons first law of motion talks about inertia, which means that if an object is at rest then it wants to stay at rest, if it is moving it wants to stay moving. (Constatnt velocity). Since the person is sitting still, when the plane takes off, the plane has more velocity & is "pulling" you towards the seat.
The force of Gravity.
When an airplane is motionless on the tarmac, discounting any winds, there are two primary forces acting on it. First is the force of gravity pushing downwards, and secondly, there is the reactionary force pushing back upwards.
The chair in pushing you up and the gravity pushing you down
It doesn't. Gravity still acts on the plane. Simply, there are other forces involved. For comparison, if you stand on the floor, there are also other forces involved, that don't let you continue falling towards the Earth's center.
The Wick Airport at Wick in Caithness, Scotland
Sitting Still was created in 1981.
He didn't, all he invented was a paving composed of tar and gravel that was given the name tarmacadam, later shortened to tarmac. Now known as asphalt on US roads, it is still called tarmac on airports everywhere.
Gravity on the plane itself, the weight of any occupants (force of gravity on occupants), and any force applied by weather influences such as wind.
It is still sitting!
"Normal" forces push up on a still car. In this case, normal forces are equal in magnitude but opposite in direction to the gravitational forces pushing down on the still car.
No
The would be balanced forces.
No, its not.