The acceleration = change in velocity ÷ time = 8 m/s ÷ 4 s = 2 m/s 2. The change in velocity v – u = 40 – 0 = 40 m/s. The acceleration = change in velocity ÷ time = 40 m/s ÷ 8 s = 5 m/s 2.

There is no resultant force and the skydiver reaches terminal velocity. When the parachute ... The object is still accelerating but its acceleration decreases as time goes by.