Soc20-Levers

Question 1

What is a lever?

Answer 1

A lever refers to a system of muscles and bones working together to bring about movement

Question 2

What is a fulcrum?

Answer 2

A fulcrum or pivot is the point around which the lever rotates(joints)

Question 3

What is a load?

Answer 3

A load is 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

What is an effort?

Answer 4

An effort is a force that is applied by the user of the lever system. The effort is supplied by your muscles.

Question 5

What is a lever arm?

Answer 5

A rigid bar such as a bone

Question 6

What are the three classes of levers?

Answer 6

First class levers,second class levers and third class levers

Question 7

Whats in the middle in a first class lever?

Answer 7

Fulcrum is in the middle

Question 8

Whats in the middle in a second class lever?

Answer 8

Load is in the middle

Question 9

What is in the middle in a third class lever?

Answer 9

Effort is in the middle

Question 10

How can we remember the levers?

Answer 10

FLE
Fulcrum
Load
Effort

Question 11

Example of a first class lever?

Answer 11

A tricep dip

Question 12

Example of a second class lever?

Answer 12

A calf raise

Question 13

Example of a third class lever?

Answer 13

Bicep curls

Question 14

What is a mechanical advantage?

Answer 14

This happens when the output of the lever is greater than the input,you are getting more out than you are putting in. First and second class levers are examples

Question 15

What is a mechanical disadvantage?

Answer 15

The input of the lever is greater than the output-the force you apply is greater than the output. Third class levers are an example of this.