Which class of lever acts when the distal segment is fixed and the muscle acts on its proximal segment?
A)First class
B)Second class
C)Third class

Question

Quizplus · Accepted Answer

Second class lever acts when the distal segment is fixed and the muscle acts on its proximal segment.
A second class lever exists whenever the two resultant forces are applied so that resistance lies between the effort and the axis of rotation.
A first class lever exists whenever two resultant forces are applied on either side of an axis at some distance from that axis which creates an opposite side rotation.
A third class lever exists whenever the forces on a lever are applied so that the effort lies closer to the axis of the lever than resistance.

Which Class of Lever Acts When the Distal Segment Is