Frictional drag Study guides, Revision notes & Summaries

What is the acceleration of a skydiver at terminal velocity whose mass is 80 kg and cross-sectional area is 14 m2. The density of the air he is falling through is 0.9984 g / m3. The drag coe_cient has a value of 0.485. Select one: a. 15.2 m / sec2 b. 56.4 m / sec2 c. 0 m / sec2 d. 481 m / sec2 e. None of the above The correct answer is: 0 m /sec2 Calculate x = vt + 1 at2 , where v = 0.227 m/s, t = 11.1s, and a = 9.80 m/s2 .a. 606.2487 m b. 606 m c. 605.5 m d. 606.249 m The correct ...

SIFT Army Aviation Information SectionA Helicopter - correct answer Is a type of rotorcraft that is able to takeoff and land vertically, hover, and fly forward, backward, and side to side (laterally). Thrust engine - correct answer an engine that produces power and delivers it to overhead and tail rotors (on most helicopters) via one or more transmissions and drive shafts. Fuselage - correct answer Main Body of the helicopter Mast - correct answer Shaft protruding from the top Co...

Mttc Integrated Science (Earth And Space Sciences) Elaborated Questions And Answers Theory of Plate Tectonics - CORRECT ANSWER-A theory stating that Earth's lithosphere is broken into huge plates that move and change in size over time - explains the process of continental drift - theory is a fusion on the theories of continental drift and seafloor spreading - continents are not floating on the ocean, rather they are rooted What are the 10 major plates of the Earth's lithosphere? - C...

Three types of Rotor Systems - correct answer 1. Semirigid - composed of two blades that are rigidly mounted to the main rotor hub 2. Rigid - the blade roots are rigidly attached to the rotor hub 3. Fully articulated - allow each blade to lead/lag (move back and forth in plane), flap (move up and down about an invoiard mounted hinge), independent of the otherblades, and feather (rotate about the pitch axis to change lift) 3 Types of Approach - correct answer Normal: 7-12 @300-500 AGL S...

SIFT (Army Aviation) Final Exam Questions 2024.Profile drag - correct answer Caused by the blades frictional resistance Induced drag - correct answer Downwash Parasite drag - correct answer Components attached to a helicopter that dont contribute to lift Total drag - correct answer Sum of profile, induced, and parasite drag. Bernoullis principle - correct answer As flow increases, pressure decreases Phases of flight - correct answer Takeoff, climb, cruise, descent, landing. Fla...

SIFT (Army Aviation)Profile drag - correct answer Caused by the blades frictional resistance Induced drag - correct answer Downwash Parasite drag - correct answer Components attached to a helicopter that dont contribute to lift Total drag - correct answer Sum of profile, induced, and parasite drag. Bernoullis principle - correct answer As flow increases, pressure decreases Phases of flight - correct answer Takeoff, climb, cruise, descent, landing. Flat and curved side pressure ...

Physics for Science Olympiad Latest 2024 Graded A+ Newton's First Law Inertia: Every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. Newton's Second Law Force = mass * acceleration Newton's Third Law for every action, there is an equal and opposite reaction. Example: If object A acts a force upon object B, then object B will exert an opposite yet equal force upon object A. 7 types of ...

SIFT (Army Aviation Information) Practice TestThe typical structure of a helicopter is a ______ (fill in the blank) with a ____ (fill in the blank) protruding upward out of it. - correct answer Fuselage (the body of the craft), Mast. The engine of the craft drives power upward through the ____ (fill in the blank) to the rotor blades, which are controlled by the pilot. - correct answer Mast This main rotor is used to generate ____ (fill in the blank). - correct answer Thrust. ____ (fill ...

Primary FiTour Aqua Exam question and answers rated A+ 2023 passedKey Benefit to Aqua Fitness - correct answer Improve Core Stability Benefits to Aqua Fitness - correct answer Improves Core Stability (Key) Speeds Up Metabolism Reduces Stress Encourages Stress Reduction Increases HDL Cholestrol Definition of Bouyancy - correct answer The upward thrust exerted by water on a body that is totally or partially immersed. Buoyancy Equipment - correct answer Used to perform downward exercis...

SIFT - Army AviationTypes of drag - correct answer Parasitic Profile Induced Parasitic drag - correct answer caused by the non-lifting portions of the helicopter (fuselage, engine, cowlings, hub, mast, landing gear, external loads) increases with airspeed, dominant type of drag at high airspeeds Profile drag - correct answer caused by frictional resistance of the lift-producing surfaces (rotor blades) passing through the air remains constant throughout speeds Induced drag - corr...