Question

A jet plane moves up in air because :
(a) The gravity does not act on bodies moving
with high speeds
(b) The thrust of the jet compensates for the
force of gravity
(c) The flow of air around the wings causes an
upward force, which compensates for the
force of gravity
(d) The weight of air whose volume is equal to
the volume of the plane is more than the
weight of the plane

Answer 1

Answer:

(b) is the correct answer......

Explanation:

Initially , when the plane is taking off, thrust force is more than the force of gravity. When it is in the air, the force of gravity is compensated by the thrustof the jet.

And when the plane lands, at that point of time , the thrust force is less than the force of gravity.