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Flashcards in Simple Machines Deck (30):
1

What item must be sacrifices in order to have a larger output force than input force?

Distance

2

What class lever is your arm or jaw?

3rd class

3

What is the stiff structure that rotates around a point?

A fulcrum

4

What is the force applied to a lever called?

The input force

5

What is the force applied to the load called?

The output force

6

What is the distance between the fulcrum and the input force called?

The input arm

7

What is the distance between the fulcrum and the output force called?

The output arm

8

What happens is the input and output arms are the same length and distance from the fulcrum?

The forces are equal

9

What class is the input force greater than the output force?

3rd class

10

Which class is the output force greater than the input force?

2nd class

11

What class is the input and output forces equal in strength?

1st class

12

If the lever is balanced, what is the mechanical advantage?

1

13

A device with moving parts that works together to accomplish a task

Machine

14

In what lever is the input force less than the output force?

2nd class

15

In what class is the input force greater than the output force?

3rd class

16

Fulcrum

Stiff structure that separates the input force and output force

17

Input

Force energy or power supplied to make a machine accomplish a task

18

Input arm

Side of lever in which input force is applied

19

Input force

Force that is applied to a machine

20

Lever

A simple machine that can be used to multiply force, multiply distance, or change the direction of a force. There are 3 classes.

21

Machine

A device with moving parts that work together to complete a task

22

Mechanical advantage

Ratio of output force divided by input force O/I

Or for levers length of input arm divided by length of output arm iA/oA

23

Output

Force energy or power provided by machine

24

Output arm

Side of lever that lifts the load

25

1st class lever

Fulcrum in the middle (OFI)
Input force= Output force
Ex: see-saw

26

2nd class lever

Output force is in middle (FOI)
Input

27

3rd class lever

Input force in middle (FIO)
Input > Output
Ex: arm or jaw

28

Output force

Force that is provided by a machine

29

Pulley

A simple machine that can increase force by changing the distance

30

Simple machine

Unpowered mechanical device that completes a task with 1 step/ movement