A 1.67 kg disc is attached to the end of a string whose length is 0.39 m. The disc slides without friction on a horizontal surface as indicated in the Figure. If the string can withstand a maximum tension of 96.9 N, what is the maximum tangential speed the disc can have before the cord breaks? HINT: The centripetal force exerted by the string on the mass must be the result of all the forces acting, i.e. the tension. m/s R The disc is whirled in a vertical circle of the same radius about a fixed point. Find the tension at the top if the speed at the top is 2.66 m/s. HINT: The centripetal force whish is the force that accelerates the mass towards the center, equals the sum of all of the forces acting on the mass. At the top, both the mass and the tension provide that force. N

A 1.67 kg disc is attached to the end of a string whose length is 0.39 m. The disc slides without friction on a horizontal surface as indicated in the Figure. If the string can withstand a maximum tension of 96.9 N, what is the maximum tangential speed the disc can have before the cord breaks? HINT: The centripetal force exerted by the string on the mass must be the result of all the forces acting, i.e. the tension. m/s R The disc is whirled in a vertical circle of the same radius about a fixed point. Find the tension at the top if the speed at the top is 2.66 m/s. HINT: The centripetal force whish is the force that accelerates the mass towards the center, equals the sum of all of the forces acting on the mass. At the top, both the mass and the tension provide that force. N

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter7: Rotational Motion And Gravitation

Section: Chapter Questions

Problem 20P: Human centrifuges are used to train military pilots and astronauts in preparation for high-g...

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Concept explainers

Angular speed, acceleration and displacement

Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.

Angular Position

Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.

Question

A 1.67 kg disc is attached to the end of a string whose length is 0.39 m. The disc slides without friction on a horizontal surface as indicated in the Figure.
If the string can withstand a maximum tension of 96.9 N, what is the maximum tangential speed the disc can have before the cord breaks? HINT: The centripetal force exerted by
the string on the mass must be the result of all the forces acting, i.e. the tension.
m/s
R
The disc is whirled in a vertical circle of the same radius about a fixed point. Find the tension at the top if the speed at the top is 2.66 m/s. HINT: The centripetal force whish is the
force that accelerates the mass towards the center, equals the sum of all of the forces acting on the mass. At the top, both the mass and the tension provide that force.
N

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