Assignment 26. Explain why a person with an open parachute has a lower terminal speed than a person with a closed parachute. 27. Why do light objects with a large cross-sectional area fall more slowly than heavy objects with a small cross-sectional area? 28. Why do astronauts appear weightless on the ISS? 29. A child has a mass of 42 kg and is on an amusement park ride. Determine the normal force acting on the child: a. When the ride is moving up at a constant velocity of 1.4 m/s. b. When the ride is accelerating down at 1.8 m/sz. c. When the ride is accelerating up at 1.8 m/sz. 30. A 72 kg person jumps up off a bathroom scale. Determine the acceleration of the person when the scale reads 840 N. 31. An electrician holds a 3.9 kg chandelier against a ceiling with a force of 61 N [y]. What is the normal force exerted by the ceiling on the chandelier? 32. An elevator and its load have a combined mass of 1600 kg and experience a force of gravity of 15680 N. It is initially moving downward at 12 m's. Find the tension in the supporting cable when the elevator is brought to rest with a constant acceleration in a distance of 42 m. 33. Jo is skydiving. She opens her parachute when she is at a height of 100. m and has a speed of 30. m/s. The parachute gives her an upward force of 520 N. d. What is her maximum mass, so that she lands at v=0? e. If her mass is 40 kg, what is her velocity 2 seconds after she opens the parachute