Problem solving and graphs. 1. The graph shows how the vertical velocity of a parachutist changes from the moment the parachutist jumps from the aircraft until landing on the ground. Opens parachute 60 50 Vertical 40 velocity in metres par Second 30 20 10 10 15 20 25 30 35 40 45 50 55 Time in seconds a. Record the two values of the terminal velocity before and after the parachutist opens his parachute. (2 marks) b. Find the distance travelled during the first terminal velocity reached before opening the parachute. (2 marks) 2. Felix reached his terminal velocity of 1,342km/h after 42 seconds. What was his average acceleration until reaching terminal velocity? (2 marks) 3. The ascent took 2 hours 30 to reach an altitude of 39,045m. What was the average velocity of the ascent? (2 marks)