(2) According to the stress diagram of the material when the helicopter flies horizontally at a uniform speed, the equilibrium conditions are as follows:
f=mgtanθ
T=mgcosθ
According to Newton's third law, F=T=mgcosθ.
Answer: (1) As shown in the figure;
(2) The air resistance f of the material and the pulling force f of the material on the suspension cable are mgtanθ and mg cos θ, respectively.