Levers

Question 1

How many classes of levers are there and how are the differentiated?

Answer 1

3 classes

Differentiated by relative orientations of the fulcrum, resistance, and effort.

Question 2

Formula for Mechanical Advantage

Answer 2

Effort distance/ resistance distance

Question 3

In a first class lever, where is the fulcrum between?

Answer 3

The effort and the resistance

Question 4

What is a good example of a first class lever?

Answer 4

Seesaw

Question 5

For a first class lever, what happens when the distance is shorter between the fulcrum and the resistance?

Answer 5

It makes is easier to move the resistance.

Question 6

First class lever applied with distance. It is HARDER to lift a person on a seesaw when they are closer to the middle.

Answer 6

F Easier

Question 7

In a 2nd class lever, the resistance is between…

Answer 7

The fulcrum and the effort.

Question 8

A second class lever is allowed to increase force and distance.

Answer 8

False, only Distance.

First Class Levels are allowed to increase force and distance.

Question 9

What is a common example of a first class level?

Answer 9

Wheelbarrow

Question 10

In a nutshell for a second class level, how are you trading distance for force?

Answer 10

By moving your end of the wheelbarrow a bit farther, you produce greater force at the load.

Question 11

What are third levers used for?

Answer 11

To produce greater distance.

Question 12

In a third class lever, the force is applied in between the…

Answer 12

Fulcrum and the resistance.

Question 13

What is a clear example of a 3rd class lever?

Answer 13

Baseball bat.

Question 14

For 3rd class levers, the closer your hands are to the base of the bat…

Answer 14

The faster you can make the other end travel.