B) south C) east D) west 2. If an airplane has an airspeed of 100 km/hr southwest is traveling 140 km/hr south relative to the ground, wh is the wind velocity? A) 40 km/hr to the east B) 100 km/hr to the southeast C) 100 km/hr to the east D) 170 km/hr to the southeast B) 0 3. An airplane capable of an airspeed of 100 km/hr is 60 km off the coast above the sea. If the wind is blowing from the coast out to sea at 40 km/hr, what is the least amount of time it will take for the plane to get to shore? A) 26 minutes B) 36 minutes C) 60 minutes D) 100 minutes 4. Neglecting air resistance, what is the total velocity of a parachutist just before engaging her parachute, 8 s after dropping from an airplane flying horizontally at 60 m/s? I SO o of a A) 60 m/s ocity B) 80 m/s without C) 100 m/s get ahead D) 140 m/s tist's eleration parabola. re the 0 C) CHAPTER 3 PRACTICE PASSAGE An airplane is susceptible to substantial deflection off course due to wind. A pilot calls the engines' contribution the airspeed. This motion relative to the air, combined with the wind velocity, results in the ground speed, or velocity relative to fixed terrestrial objects. wind 1. A pilot wanting t from the west at direct her airplane A) north B) south C) east D) west airspeed ground speed 2. If an airplane has A) is traveling 140 km is the wind velocit 40 km/hr to the eas B) 100 km/hr to the sc C) 100 km/hr to the ea D) 170 km/hr to the so 3. An airplane capable off the coast above the coast out to sea of time it will take f A) 26 minutes B) 36 minutes C) 60 minutes D) 100 minutes Figure 1 When a parachutist typically leaves an airplane, it is not so much a jump as a drop. He steps out of a door or lets go of a strut under the wing, not giving him any significant velocity relative to the airplane. He becomes subject to gravity without the lift of the wings. Air resistance allows the plane to get ahead of him. If we neglect this drag effect, then the parachutist's constant horizontal velocity and constant vertical acceleration gives him a trajectory resembling half of an inverted parabola. This is a reasonable assumption for the free fall before the parachute is engaged. 4. Neglecting air resista parachutist just before dropping from an airp A) 60 m/s B) 80 m/s C) 100 m/s D) 140 m/s