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AQA PE > Types Of Levers 2.1 > Flashcards

Types Of Levers 2.1 Flashcards

1
Q

Lever definition

A

Rigid bar that turns about an axis

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2
Q

What do all levers have

A

Fulcrum, load and effort

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3
Q

Fulcrum definition

A

Fixed point at which a lever turns (aka axis)

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4
Q

Load definition

A

The weight/resistance a lever must move

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5
Q

Effort definition

A

Force required to move the load

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6
Q

What is the fixed point at which a lever turns

A

Fulcrum

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7
Q

What is the weight/resistance that the lever must move

A

Load

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8
Q

What is the force required to move the load

A

Effort

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9
Q

What class lever has the fulcrum in the middle

A

First class

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10
Q

What does a first class lever have in the middle

A

Fulcrum

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11
Q

What class lever has the load in the middle

A

Second class

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12
Q

What is in the middle of a second class lever

A

Load

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13
Q

What is in the middle of a third class lever

A

Effort

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14
Q

What class lever has the effort in the middle

A

Third class

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15
Q

Remembering the class of levers

A

1 F
2 L
3 E

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16
Q

Load arm definition

A

Distance from the load to the fulcrum

17
Q

Distance from the load to the fulcrum

A

Load arm

18
Q

Effort arm definition

A

Distance from effort to fulcrum

19
Q

Distance from effort to fulcrum

A

Effort arm

20
Q

How to calculate mechanical advantage

A

Mechanical advantage = effort arm / load arm

21
Q

What is calculated by effort arm / load arm

A

Mechanical advantage

22
Q

When is a lever said to have high mechanical advantage

A

When effort arm is longer than load arm

23
Q

When is a lever said to have low mechanical advantage

A

When load arm is longer than effort arm

24
Q

What class levers always have high mechanical advantage

A

Second class levers

25
Q

What class lever always has a low mechanical advantage

A

Third class levers

26
Q

What class lever can have either a high or low mechanical advantage

A

First class levers

27
Q

What type of mechanical advantage does a second class lever have

A

High mechanical advantage

28
Q

What type of mechanical advantage does a third class lever have

A

Low mechanical advantage

29
Q

What type of mechanical advantage does a first class lever have

A

High or low mechanical advantage

30
Q

What can levers with high mechanical advantage do (2)

A
  • move large loads

- relatively low effort

31
Q

What can levers with a low mechanical advantage do (3)

A
  • increase distance covered
  • increase the speed at the end of arm
  • larger range of movement with low effort

AQA PE (9 decks)

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