2016.06.20 CSCS Daily Study Question:
This type of lever has a both the resistive force and the muscle force acting on the same side of a fulcrum. The moment arm of resistive force is smaller than the moment arm of muscular force. Which type of lever is it?
(A) 1st Class Lever
(B) 2nd Class Lever
(C) 3rd Class Lever
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Correct Answer:
(B) 2nd Class Lever
Explanation:
2nd and 3rd class levers both have resistive and muscle forces that act on the same side of a fulcrum, the the 2nd class lever has a longer moment arm of muscular force and the 3rd class lever has a longer moment arm of resistive force. 1st class levers have resistive and muscle forces that act on opposite sides of a fulcrum.
Reference:
Essentials of Strength Training & Conditioning 3rd edition p. 69 – 70
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2016.06.20 CSCS Daily Study Question