# The plane rises from the runway into the air: 1) explain whether the value of gravity changes when the plane

**The plane rises from the runway into the air: 1) explain whether the value of gravity changes when the plane takes off 2) estimate the values and calculate the force of gravity acting on the plane. List all the steps in your solution.**

1) The magnitude of the force of gravity acting on an object (in this case, an airplane) depends only on the mass of this object and the acceleration of gravity. Since the mass of the aircraft does not depend on the lift height, and the acceleration of gravity near the radius of the earth can be considered constant, the force of gravity does not change during takeoff of the aircraft;

2) Let the mass of the aircraft be m = 20 tons = 20,000 kilograms. Then the force of gravity acting on the plane will be equal to:

G = m * g = 20,000 * 10 = 200,000 Newtons (where g = 10 Newtons / kilogram).