Answer:
1) Weight of the skydiver will exert net force of 600 N downwards
2) Force due to air is opposite to the motion of skydiver which is 400 N upwards
Step-by-step explanation:
When skydiver jumps into the air then force due to air is opposite to the motion
So let say the diver is moving downwards with some speed then downwards weight of the diver is 600 N
And the force due to air is opposite to the motion and inclined upwards
This force is F = 400 N
Now net downward force will accelerate the diver downwards by
F = 600 - 400 = 200 N