Physics, 26.02.2021 05:20 alyssabalinnt
At the 2009 Berlin World Championships, Usain Bolt set the world record in the 200m race. During the race he reached a maximum speed of 12.27 meters per second. If Usain weighs 96.54 kg and he ran the entire race at this speed, how much kinetic energy would he have generated in units of -
Answers: 2
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If forces acting on an object are unbalanced, which factors may result fron an unbalanced force? check all that apply
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Explain to someone who knows nothing about fossils the study of invertebrate paleontology and how it scientists understand the history of the earth. be sure your explanation contains a minimum of two complete sentences.
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The center of a long frictionless rod is pivoted at the origin, and the rod is forced to rotate in a vertical plane with constant angular velocity \omega. write down the lagrangian for a bead of mass m threaded on the rod, using r as your generalized coordinate, where r, \phi are the polar coordinates of the bead. (notice that \phi is not an independent variable since it is fixed by the rotation of the rod tobe \phi = \omega * t) solve lagrange's equation for r(t). what happens if the bead is initially at rest at the origin? if it is released from any point ro > 0, show that r(t) eventually grows exponentially. explain your results in terms of the centrifugal force m* \omega ^2 *r.
Answers: 3
At the 2009 Berlin World Championships, Usain Bolt set the world record in the 200m race. During the...
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