Frictional drag Study guides, Revision notes & Summaries

StraighterLine PHY 250 General Physics All Graded Exams PHY250_TW | Chapter 3: Dynamics Started on Sunday, April 26, 2020, 7:31 PM State Finished Completed on Sunday, April 26, 2020, 8:27 PM Time taken 55 mins 26 secs Grade 132.00 out of 150.00 (88%) Feedback You’re off to a good start. A course grade of 70% is required to request a transcript. You’ve met that for the first exam already, but if you want to reattempt for a higher grade you can retake this assessment ...

Theory of Plate Tectonics - 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? - ANSWER African, Antarctic, Australian, Eurasian, North American, South American, Pacific, Cocos, N...

2021 Army SIFT testThe four aerodynamics forces. - correct answer Thrust, Drag, Weight and Lift Thrust - correct answer The forward force produced by the power plant/propeller or rotor. It opposes or overcomes the force of drag. As a general rule, it acts parallel to the longitudinal axis. Drag - correct answer A rearward, retarding force caused by disruption of airflow by the wing rotor, fuselage, and other protruding objects. Drag opposes thrust and acts rearward parallel to the relative...

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 - correct answer Fla...

The 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 in the blank) is balanced by a second ro...

StraighterLine PHY 250 General Physics I All Graded Exams 2023 Started on Sunday, April 26, 2020, 7:31 PM State Finished Completed on Sunday, April 26, 2020, 8:27 PM Time taken 55 mins 26 secs Grade 132.00 out of 150.00 (88%) Feedback You’re off to a good start. A course grade of 70% is required to request a transcript. You’ve met that for the first exam already, but if you want to reattempt for a higher grade you can retake this assessment (only the first graded assessmen...

PHY 250 General Physics I All Exams Questions and Answers Latest Updated 2024 StraighterLine (GRADED) What is the acceleration of a skydiver at terminal velocity whose mass is 80 kg and cross-sectional area is 14 m . The density of the air he is falling through is 0.9984 g / m . The drag coe_cient has a value of 0.485. Select one: a. 15.2 m / sec b. 56.4 m / sec c. 0 m / sec d. 481 m / sec e. None of the above The correct answer is: 0 m /sec Calculate , where v = 0.227 m/s, ...

2021 Army SIFT testThe four aerodynamics forces. - correct answer Thrust, Drag, Weight and Lift Thrust - correct answer The forward force produced by the power plant/propeller or rotor. It opposes or overcomes the force of drag. As a general rule, it acts parallel to the longitudinal axis. Drag - correct answer A rearward, retarding force caused by disruption of airflow by the wing rotor, fuselage, and other protruding objects. Drag opposes thrust and acts rearward parallel to the relative...

SIFT - Army Aviation 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-...

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 ...