I think the answer is D: advantageous
The particles in diagram 3 move fast enough to break away from each other.
Answer:
Time taken by the coin to reach the ground is 1.69 s
Given:
Initial speed, v = 11.8 m/s
Height of the building, h = 34.0 m
Solution:
Now, from the third eqn of motion:



Now, time taken by the coin to reach the ground is given by eqn (1):
v' = v + gt

When plane is flying along the wind then we can say



Now when its going against the wind the speed is given by



Now by the above two equations we will have

