A parachutist jumps out of the plane and falls freely for two seconds. He then opens the parachute and his speed is reduced to 2 m/s in 4 s.
Calculate his speed before he opens the parachute.
What is his deceleration after opening the parachute?
From what minimum height must the parachutist jump in order for him to land at a speed of 2 m/s?
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