Lever Systems

Question 1

Lever arm

Answer 1

The bone/body part being moved about a point. Shown as straight line

Question 2

Fulcrum

Answer 2

The joint where a lever arm pivots

Question 3

Effort

Answer 3

The force applied by the muscles to the lever arm.

Question 4

Load

Answer 4

The pull of the muscles on the lever arm. The weight that is being lifted.

Question 5

First class clever system

Answer 5

The fulcrum is in the middle of

Question 6

Second class lever system

Answer 6

The load is in the middle

Question 7

Third class lever system

Answer 7

The effort is in the middle. - knee, elbow

Question 8

Mechanical advantage

Answer 8

When the effort arm is greater then the weight arm so a greater load can be moved with less effort

Question 9

First class lever advantage

Answer 9

Can have both high and low advantage. If fulcrum is CLOSER to the load there is a Hugh mechanics, advantage.

Question 10

Second class lever advantage

Answer 10

Have a high mechanical advantage because effort arm is greater than the load arm.

Question 11

Third class lever advantage

Answer 11

Has a mechanical disadvantage as weight arm is longer then effort arm. But it can generate more speed