Air Resistance is Present. Since the skydiver is moving relative to the surrounding air, there is an air resistance force on the skydiver. A block rests on top of a table. Consider only the forces acting upon the block. Depress mouse to view answer.
Gravity is Present.
Since the block has mass, there is a gravitational force on it. Depress mouse to view answer. Spring force is Absent. Since no spring is touching the block, there is not a spring force on it. Depress mouse to view answer.