lever systems Flashcards

1
Q

draw 1st class leve including load arm and effort arm

A
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2
Q

draw 2nd class lever incuding load arm and effort arm

A
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3
Q

draw 3rd class lever including load arm and effort arm

A
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4
Q

what is a practical example for first class lever system

A

tricep extension at the elbow

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5
Q

what is practical example for 2nd class level system

A

plantar flexion at ankle

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6
Q

what is a practical example for 3rd class lever system

A

bicep curl (flexion of elbow)

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7
Q

what is mechanical advantage of the 1st class lever system

A

effort arm is comparitively small so advantage is low a.k.a. mechanical disadvantage

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8
Q

what is the mechanical advantage of the 2nd class lever system

A

effort arm is larger than the load arm so high mechanical advantage

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9
Q

what is the mechanical advantage of the 3rd class lever system

A

load arm is bigger than effort arm so mechanical advantage is low

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10
Q

define mechanical advantage

A

the efficiency of a lever in moving a load

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11
Q

acronym to remember lever system

A

123
FLE

the letter is whichever factor is in the middle of the diagram.

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