Asmall plane is initially flying due west with an airspeed (speed relative to the air) of 50 m/s. the plane flies into a-region where the wind is blowing toward the southwest at 20 m/s. if the pilot does not change the heading of the plane, the speed of the plane relative to the ground a. is greater than

velocity of plane with respect to air is given as 50 m/s towards west

now speed of the wind is given as 20 m/s south west

now the net speed with respect to ground is given as

so this speed with respect to ground is 65.7 m/s

this is greater than the speed with respect to air

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .