Soc 20- Levers

Question 1

What is a lever?

Answer 1

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

Question 2

Whats the function of a lever?

Answer 2

Muscles pull on your bones, and your bones create movement, acting as levers

Question 3

What is a fulcrum?

Answer 3

The point around which a leaver rotates. (Triangle)

Question 4

What is a the load?

Answer 4

Force that is applied by the leaver system. (square)

Question 5

What is the effort?

Answer 5

Force that is applied by the usar of the leaver system. (Arrow)

Question 6

What is a lever arm?

Answer 6

Rigid bar such as a bome

Question 7

The 3 types of leavers

Answer 7

First class- fulcruim in the middle
Second class- loud in the middle
Third class- effort in the middle

Question 8

Example of first class lever

Answer 8

. Nodding your head

Question 9

2 examples of second class lever

Answer 9

. Calf raises
. Using a wheelbarrow

Question 10

2 examples of a 3 class lever

Answer 10

. Bicep curl
. Using a spade

Question 11

What is a mechanical advantage?

Answer 11

A large load being lifted with a relatively small amount of effort. This happends when the output of the leaver is greater than the input.

Question 12

What is a mechanical disadvantage?

Answer 12

When the input of the leaver is greater than the input