In the plane: , The skydiver is not moving, There is no air resistance, Downwards force of weight and upthrust are equal, Accelerating: , As skydiver falls velocity increases because of the downward force of weight, As velocity increases the air resistance increases and this causes the rate of acceleration to reduce, There is a resultant force downwards, First Terminal Velocity: , Eventually the forces of weight and air resistance balance., There is no acceleration for the first time., Velocity is constant for the first time, Parachute Opens: , The air resistance vastly increases., Skydiver decelerates rapidly, There is a resultant force upwards, Second Terminal Velocity: , Weight and air resistance are balanced once more, Air resistance has decreased due to reduced velocity, There is no resultant force for the second time,

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