Soc 20 Levers

Question 1

What is a lever?

Answer 1

Refers to s system os muscles and bones to work together to bring about movement

Question 2

What are the 4 components of levers

Answer 2

1) a fulcrum - the point around which the lever rotates.

Question 3

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Answer 3

2) a load - the force that is applied by the lever system. The load is the object you want to move a dumb bell with your arm.

Question 4

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Answer 4

Aan edfort- a force that is applied by the user of the leversystem. The effort is supplied by your muscles .

Question 5

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Answer 5

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Question 6

Different class od levers

Answer 6

First class
Sexond class
Third class

Question 7

FLE

Answer 7

First class lever- fulcrum is in the middle
Sexond class lever- load is in the middle
Third class lever- effort is in the middle

Question 8

Example pf first class

Answer 8

Tricep dip- elbow is the fulcrumwhich sits between the load and the effort applied by the tricep

Question 9

Example of second class

Answer 9

Calf raise- the load sits between the toes and the ball of the feet (fulcrum) and the gastrocnemius muscles apply the effort by pulling the heel

Question 10

Third class lever example

Answer 10

Bicep curl- you arre using a third class lever as the effort is applied by the bicep muscle which is between the fulcrum at the elbow joint and the weight in your hand

Question 11

Mechanical advantage

Answer 11

When the output of the lever is greater than the input
When the load is greater than the effort so you are getting more out than ypu are putting in

Divide input by output

First and second levers work at a mechanical advantage

Question 12

Mechanical disadvantage

Answer 12

When the effort and the load are boththe same side of the fulcrum but the effprt sits closer to the fulcrum than the load.
The force you apply os greater than the load so you are putting in more than you are getting out

Third class levers work at a mechanical disadvantage