ericmazur
commented
8 years ago Ah, yes, of course! Thanks for pointing this out.
What have all these reviewers been doing????????
Eric Mazur Harvard University Area Dean of Applied Physics Balkanski Professor of Physics and of Applied Physics
Vice President, The Optical Society
Too short? Here's why: http://emailcharter.org/
On Oct 25, 2015, at 8:16 PM, JohnDenker notifications@github.com wrote:
In section 12.1 on page 284 it says emphatically:
For a stationary object, the sum of the torques is zero.
That violates a fundamental principle of physics: Force is not motion.
Stationary is a statement about motion or lack thereof. Torque is the rotational analog of force. It is one derivative removed from rotational motion.
It would be much better to say:
For an object in mechanical equilibrium, the sum of the torques is zero.
— Reply to this email directly or view it on GitHub.
In section 12.1 on page 284 it says emphatically:
That violates a fundamental principle of physics: Force is not motion.
Stationary is a statement about motion or lack thereof. Torque is the rotational analog of force. It is one derivative removed from rotational motion.
It would be much better to say: