Difference between revisions of "Lever"
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===Meaning=== | ===Meaning=== | ||
A [[lever]] is a [[Force Multiplier]] or a [[Distance Multiplier]] that uses a [[pivot]] to create a [[moment]]. | A [[lever]] is a [[Force Multiplier]] or a [[Distance Multiplier]] that uses a [[pivot]] to create a [[moment]]. | ||
| + | |||
| + | ===About Levers=== | ||
| + | : [[Lever]]s are used to lift cars with a jack, pull out nails with a hammer and to break locks with a crowbar. | ||
| + | : A '''lever''' needs a long stiff rod and a [[pivot]]. | ||
| + | |||
| + | {| class="wikitable" | ||
| + | |- | ||
| + | |[[File:Lever.png|center|400px]] | ||
| + | |- | ||
| + | | style="height:20px; width:400px; text-align:center;" |A lever makes it easier to lift a heavy object. | ||
| + | |} | ||
| + | |||
| + | ==Key Stage 4== | ||
| + | ===Meaning=== | ||
| + | A [[lever]] is a [[Force Multiplier]] or a [[Distance Multiplier]] that uses a [[pivot]] to create a [[moment]]. | ||
| + | |||
| + | ===About Levers=== | ||
| + | : [[Lever]]s work as [[Force Multiplier|force multipliers]] by applying a [[force]] of [[effort]] at a greater distance from the [[pivot]] than the [[force]] of [[load]]. | ||
| + | : A '''lever''' needs a long stiff rod and a [[pivot]]. | ||
| + | |||
| + | {| class="wikitable" | ||
| + | |- | ||
| + | |[[File:WheelbarrowLever.png|center|400px]] | ||
| + | |- | ||
| + | | style="height:20px; width:400px; text-align:center;" |The [[force]] of [[effort]] is 3 times further from the [[pivot]] than the [[force]] of [[load]], so the [[effort]] is 3 times smaller than the [[load]]. | ||
| + | |} | ||
Revision as of 16:11, 11 February 2019
Contents
Key Stage 2
Meaning
A lever is a tool which can be used to make lifting easier.
About Levers
- Levers are used to lift cars with a jack, pull out nails with a hammer and to break locks with a crowbar.
- A lever needs a long stiff rod and a pivot.
- A seesaw can work as a lever. If an adult sits close to the centre and a child sits at the far end, the child can lift the adult.
 |
| A lever makes it easier to lift a heavy object. |
Key Stage 3
Meaning
A lever is a Force Multiplier or a Distance Multiplier that uses a pivot to create a moment.
About Levers
- Levers are used to lift cars with a jack, pull out nails with a hammer and to break locks with a crowbar.
- A lever needs a long stiff rod and a pivot.
|
| A lever makes it easier to lift a heavy object. |
Key Stage 4
Meaning
A lever is a Force Multiplier or a Distance Multiplier that uses a pivot to create a moment.
About Levers
- Levers work as force multipliers by applying a force of effort at a greater distance from the pivot than the force of load.
- A lever needs a long stiff rod and a pivot.
 |
| The force of effort is 3 times further from the pivot than the force of load, so the effort is 3 times smaller than the load. |