Soc 20: Levers

Question 1

Lever?

Answer 1

System of muscles and bones working together to bring about movement

Question 2

4 Lever components?

Answer 2

Fulcrum
Load
Effort
Lever Arm

Question 3

Fulcrum?

Answer 3

The point around which the lever rotates

Question 4

Load?

Answer 4

The force that is applied by the Lever system

Question 5

Effort?

Answer 5

A force that is applied by the user of the lever system

Question 6

Lever Arm?

Answer 6

A rigid bar such as a bone

Question 7

First Class?

Answer 7

In a first class lever, the fulcrum sits in the middle, between the load and the effort.

Question 8

Second Class?

Answer 8

In a second class levers, the load sits between the fulcrum and effort

Question 9

Third Class?

Answer 9

In a third class lever, the effort is applied between the fulcrum and the load

Question 10

Mechanical Advantage?

Answer 10

The output of the lever is greater than the input

Question 11

Mechanical Disadvantage?

Answer 11

When the effort and the load are both the same side of the fulcrum but the effort sits closer to the fulcrum than the load does