Physics, 06.08.2019 17:20 21ghostrider21
Aprofessor sits on a rotating stool that is spinning at 10.010.0 rpm while she holds a heavy weight in each of her hands. her outstretched hands are 0.7850.785 m from the axis of rotation, which passes through her head into the center of the stool. when she symmetrically pulls the weights in closer to her body, her angular speed increases to 32.532.5 rpm. neglecting the mass of the professor, how far are the weights from the rotational axis after she pulls her arms in?
Answers: 3
Physics, 22.06.2019 01:10
The x-coordinate of a particle in curvilinear motion is given by x = 3.1t3 - 4.9t where x is in feet and t is in seconds. the y-component of acceleration in feet per second squared is given by ay = 2.3t. if the particle has y-components y = 0 and vy = 5.0 ft/sec when t = 0, find the magnitudes of the velocity v and acceleration a when t = 1.8 sec. sketch the path for the first 1.8 seconds of motion, and show the velocity and acceleration vectors for t = 1.8 sec. answers: v = ft/sec a = ft/sec2
Answers: 2
Physics, 22.06.2019 01:30
Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.
Answers: 1
Aprofessor sits on a rotating stool that is spinning at 10.010.0 rpm while she holds a heavy weight...
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