Torque: Two forces produce equal torques on a door about the door hinge. The first force is applied at the midpoint of the door; the second force is applied at the doorknob. Both forces are applied perpendicular to the door. Which force has a greater magnitude?
A. the first force (at the midpoint)
B. the second force (at the doorknob)
C. The two forces are equal.
Answer: A
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