Soc 20 - Lever Systems

Question 1

Fulcrum

Answer 1

The point around which a lever rotates

Question 2

Load

Answer 2

The force that is a applied by the lever system

Question 3

Effort

Answer 3

The force that’s applied by the user of the leaver system

Question 4

Lever arm -

Answer 4

A rigid bar like a bone.

Question 5

In what order are the sections of a second class lever (starting from the left)

Answer 5

Effort, load, fulcrum

Question 6

When would we use a second class lever?

Answer 6

One example of when we would use a second class lever is when we pull our heels up just before we jump up in the air for a header.

Question 7

Advantages of first class and 2nd class levers….

Answer 7

Stable
Strong
Increasing the length of the lever arm increases the mechanical advantage.

Question 8

Disadvantaged of 1st and 2nd class lever

Answer 8

Slow limited flexibility

Question 9

Advantage of a third class lever system….

Answer 9

Fast movement
Large range of motion
Increasing lenth decreased the mechanical advantage

Question 10

Disadvantage of a 3rd class lever system….

Answer 10

The force applied must always exceed the load.