Physics, 25.10.2019 22:43 Alysssssssssssa
Alumberjack (mass = 103 kg) is standing at rest on one end of a floating log (mass = 255 kg) that is also at rest. the lumberjack runs to the other end of the log, attaining a velocity of +2.93 m/s relative to the shore, and then hops onto an identical floating log that is initially at rest. neglect any friction and resistance between the logs and the water. (a) what is the velocity of the first log (again relative to the shore) just before the lumberjack jumps off? (b) determine the velocity of the second log (again relative to the shore) if the lumberjack comes to rest relative to the second log.
Answers: 3
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How does the kinetic energy of a charge change as the charge moves under the effect of an electric field from higher potential to lower potential? a.the kinetic energy increases.b.the kinetic energy decreases.c.the kinetic energy remains the same.d.the kinetic energy is always zero.
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The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.
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Alumberjack (mass = 103 kg) is standing at rest on one end of a floating log (mass = 255 kg) that is...
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