Soc 20

Question 1

Levers

Answer 1

Action being taken place with muscle and bones.

Question 2

First class lever

Answer 2

fulcrum sits in the middle, between the load and the effort.

Question 3

Second Class

Answer 3

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

Question 4

Second class example.

Answer 4

wheelbarrow is a good example. The wheel is the fulcrum, the handles take the effort, and the load is placed between them.

Question 5

Third class

Answer 5

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

Question 6

Third class levers examples

Answer 6

They enable you to convert small movements into large actions. To lift something with your hand, your muscles only had to contract a few centimetres. You may be exerting more effort, but you are living the load a far greater distance. If your arm were designed with a mechanical advantage, your muscles would have to contract a much longer distance than you wanted to move the object. Your elbow would be dragging on the floor

Question 7

Second class in the body

Answer 7

When you planter flex your foot to raise your body up on your toes, you use the ankles as a second class lever system. The ball of your foot/toes acts as the fulcrum. The ankle planter-flexor muscles apply effort to the heel bone to lift your body (the load). Again, with a small effort, you can move a larger load.

Question 8

First class in body

Answer 8

The head is a first class leaver system. Your neck muscles provide the effort to move your head (the load) around the top of your spine (the fulcrum). With a small effort, you can move a large load