- Why can't you open a door by pushing on its hinged sides? A. the distance r to the axis of rotation is zero. B. the torque is zero. C. an infinite force would have to be applied. D. all of the above. E. only A and B are correct.

- Why can't you open a door by pushing on its hinged sides? A. the distance r to the axis of rotation is zero. B. the torque is zero. C. an infinite force would have to be applied. D. all of the above. E. only A and B are correct.

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter8: Rotational Motion

Section: Chapter Questions

Problem 82A

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Concept explainers

Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.

Question

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1. Why can't you open a door by pushing on its hinged sides?
A. the distance r to the axis of rotation is zero.
B. the torque is zero.
C. an infinite force would have to be applied.
D. all of the above.
E. only A and B are correct.

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