In a famous Physics 218 experiment a student stands on a platform which is free to rotate on frictionless bearings. The moment of inertia of the platform about the vertical axle through its center is a known constant I. He has his arms extended with a huge mass m in each hand. If he is set into rotation with angular velocity w, and then drops his hands to his sides, what happens to his angular velocity? Assume that the man's mass is negligible and that his arms have length d when extended and are d/4 from the center of his body when at his sides. @o т т Call the angular velocity that you found @, . Now the instructor applies a constant decelerating force F, to the edge of the platform that is directed as shown. How long will it take for the platform to come to stop after the force is applied? The radius of the platform is R. View from above Fo Fo

icon
Related questions
Question

need help with this one. photo attatched

In a famous Physics 218 experiment a student stands on a platform which is free to rotate on
frictionless bearings. The moment of inertia of the platform about the vertical axle through its center is
a known constant I. He has his arms extended with a huge mass m in each hand. If he is set into
rotation with angular velocity w, and then drops his hands to his sides, what happens to his angular
velocity? Assume that the man's mass is negligible and that his arms have length d when extended and
are d/4 from the center of his body when at his sides.
@o
т
т
Call the angular velocity that you found @, . Now the instructor applies a constant decelerating force
F, to the edge of the platform that is directed as shown. How long will it take for the platform to come
to stop after the force is applied? The radius of the platform is R.
View from above
Fo
Fo
Transcribed Image Text:In a famous Physics 218 experiment a student stands on a platform which is free to rotate on frictionless bearings. The moment of inertia of the platform about the vertical axle through its center is a known constant I. He has his arms extended with a huge mass m in each hand. If he is set into rotation with angular velocity w, and then drops his hands to his sides, what happens to his angular velocity? Assume that the man's mass is negligible and that his arms have length d when extended and are d/4 from the center of his body when at his sides. @o т т Call the angular velocity that you found @, . Now the instructor applies a constant decelerating force F, to the edge of the platform that is directed as shown. How long will it take for the platform to come to stop after the force is applied? The radius of the platform is R. View from above Fo Fo
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps with 3 images

Blurred answer