Aman jumps from an airplane and does not open his parachute immediately. as he falls, two forces act on him: the force mg due to gravity and the force na of air resistance. now he opens his parachute and begins to fall at constant velocity what forces act upon him now? 1. since he is falling at constant velocity the force of air resistance no longer acts on him. 2. the same two forces act on him as before the only change is that with the parachute open, the two forces sum to zero. 3. when the parachute opens there is an additional force np which has nothing to do with either na or mg. 4. since he is falling at constant velocity gravity no longer acts on him. 5. none of these
Answers: 3
Physics, 21.06.2019 23:00
Asubmarine has a "crush depth" (that is, the depth at which water pressure will crush the submarine) of 250 m. what is the approximate pressure (water plus atmospheric) at this depth? (recall that the density of seawater is 1025 kg/m3, g = 9.81 m/s2, and 1 kg/(ms2) = 1 pa = 9.8692 10-6 atm.) a. 34.8 atm b. 24.8 atm c. 25.8 atm d. 7.8 atm
Answers: 2
Physics, 22.06.2019 14:30
Slab pull” is a type of tectonic plate movement that occurs due to the forces of mantle convection and results in the subduction of the lithosphere true or false
Answers: 2
Physics, 22.06.2019 19:00
Friction removes energy from objects in motion. which statement best describes how this works? a) friction transforms ke into thermal energy b) friction transfers thermal energy to ke c) friction transforms te into pe d) friction transforms pe into ke e) friction transfers ke into pe
Answers: 1
Physics, 23.06.2019 01:30
Which statements did both aristotle and ptolemy assume? check all that apply.
Answers: 1
Aman jumps from an airplane and does not open his parachute immediately. as he falls, two forces act...
Mathematics, 19.07.2019 10:10
History, 19.07.2019 10:10
Mathematics, 19.07.2019 10:10
Social Studies, 19.07.2019 10:10
Mathematics, 19.07.2019 10:10