Soc 20 Levers

Question 1

First class lever

Answer 1

Fulcrum in the middle
Example: Triecp dip/ nodding head
Working at mechanical advantage

Question 2

Second class lever

Answer 2

Load in the middle
Examples: Calf raises/ wheelbarrow
Work at a mechanical advantage

Question 3

Third class lever

Answer 3

Effort in the middle
Examples: Bicep curl/ using a spade
Werk at a mechanical disadvantage

Question 4

What does FLE stand for

Answer 4

Fulcrum
Load
Effort

Question 5

Mechanical disdvantage

Answer 5

Third class levers cannot lift as heavy a load with the same amount of effort,due to the position of the effort and load from the fulcrum

Question 6

Mechanical advantages

Answer 6

A large load can be lifted with a relatively small amount of effort

Question 7

When does a mechanical advantage happen

Answer 7

The output of the lever is greater than the input- the load is greater than the effort, so you are getting more out than you are putting in

Question 8

What 2 levers work at a mechanical advantage

Answer 8

First and second class

Question 9

When does a mechanical disadvatage happen

Answer 9

This happens when the effort and the load are both the same side of the fulcrum but the effort sists closer to the fulcrum than the loads

Question 10

Fulcrum

Answer 10

Or pivot- the point around which he lever rotates(joints)

Question 11

Load

Answer 11

The force that is applied by the lever system (resistance/object)

Question 12

Effort

Answer 12

A force that is applied by the lever system(muscles)

Question 13

Lever arm

Answer 13

A rigid bar such as a bone

Question 14

4 components of a lever structre

Answer 14

Fulcrum
Load
Effort
Lever arm

Question 15

Where does the fulcrum sit in the first class levers

Answer 15

The fulcrum sits in the middle, between the load and the effort

Question 16

Where does the load sit in a second class lever

Answer 16

The load sits in the middle, bewteen the fulcrum and the effort

Question 17

Where does the effort sit in the middle of a third class lever

Answer 17

The effort sits in the middle between the fulcrum and the load

Question 18

Example of a first class lever

Answer 18

Tricep dip

Question 19

What is the fulcrum load and effort when doing a tricep dip

Answer 19

The elbow is the fulcrum which sits between the load (bodyweight) and the effort applied by the tricep