Answer
A rotating door is pushed.
Work Step by Step
The center of mass of the door remains stationary while the door itself rotates about its axis. Therefore, there is a net torque but no net force.
Physics Technology Update (4th Edition)
by Walker, James S.
Published by
Pearson
ISBN 10:
0-32190-308-0
ISBN 13:
978-0-32190-308-2
Chapter 11 - Rotational Dynamics and Static Equilibrium - Conceptual Questions - Page 365: 6
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