Consider two forces of magnitudes F1 and F2. F2 = 2F1. If F2 is applied perpendi

Question

Consider two forces of magnitudes F1 and F2. F2 = 2F1. If F2 is applied perpendicularly to a door at
a distance of r from the axis, how should F1 be applied to the door so that the net torque on the
door is zero?
a. It is not possible for two forces of different magnitudes to exert a net torque of zero on an
object.
b. F1 should be applied perpendicularly to the door at a distance of (1/2)r from the axis in the
opposite direction to F2.
c. F1 should be applied perpendicularly to the door at a distance of 2r from the axis in the
opposite direction to F2.

Explanation / Answer

c. F1 should be applied perpendicularly to the door at a distance of 2r from the axis in the opposite direction to F2.

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