Soc 20: Levers

Question 1

How many components does a lever have?

Answer 1

A lever is a structure that has four components:

Question 2

What are the different components of a lever?

Answer 2

1) a fulcrum - (or pivot) - the point around which the lever rotates (joints)
● 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
● 3) an effort- a force that is applied by the user of the lever system. The Effort is supplied By your muscles
● 4)leverarm-a rigid bar such as a bone

Question 3

How many different classes of levers are there?

Answer 3

3

Question 4

What are the names of the 3 different types of levers?

Answer 4

First
Second
Third class

Question 5

How are different levers classified

Answer 5

Levers are classified according to the placement of the fulcrum, load and effort.

Question 6

How do you know it is a first class lever?

Answer 6

Fulcrum is in the middle

Question 7

How do you know it is a second class lever?

Answer 7

Load is in the middle

Question 8

How do you identify a 3rd class lever?

Answer 8

Effort is in the middle.