Difference between revisions of "Weight"
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|[[File:WeightBoat.png|center|250px]] | |[[File:WeightBoat.png|center|250px]] | ||
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− | | style="height:20px; width:200px; text-align:center;" | | + | | style="height:20px; width:200px; text-align:center;" |[[Weight]] makes a tennis ball fall to the ground. |
− | | style="height:20px; width:200px; text-align:center;" | | + | | style="height:20px; width:200px; text-align:center;" |[[Weight]] holds the bowling ball to the ground. |
− | | style="height:20px; width:200px; text-align:center;" | | + | | style="height:20px; width:200px; text-align:center;" |If the [[weight]] of a boat were bigger than the [[upthrust]] the boat would sink. |
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|[[File:WeightCar.png|center|250px]] | |[[File:WeightCar.png|center|250px]] | ||
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|[[File:WeightPlane.png|center|250px]] | |[[File:WeightPlane.png|center|250px]] | ||
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− | | style="height:20px; width:200px; text-align:center;" | | + | | style="height:20px; width:200px; text-align:center;" |The [[weight]] of the [[car]] acts from its [[Centre of Mass|centre of mass]]. |
− | | style="height:20px; width:200px; text-align:center;" | | + | | style="height:20px; width:200px; text-align:center;" |The submarine has the same [[weight]] under the water as it would on land, but in the water this is [[Balanced Forces|balanced]] by the [[upthrust]]. |
− | | style="height:20px; width:200px; text-align:center;" | | + | | style="height:20px; width:200px; text-align:center;" |Planes can be very heavy but their [[weight]] is [[Balanced Forces|balanced]] by the [[lift]]. |
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Revision as of 12:22, 15 October 2018
Contents
Key Stage 2
Meaning
Weight is how heavy or light something is.
About Weight
- Objects have weight because of the gravity of the Earth.
- Weight can be measured using a Newton Meter or a Measuring Scale.
- Weight is measured in Newtons but can also be measured in stone, pounds and ounces.
- Weight depends on the amount of mass an object has.
Golf Ball | Beach Ball | Bowling Ball |
The Golf Ball is not made of much material so it is lightest. | The Beach Ball might be the biggest but it is not the heaviest. | The Bowling Ball is made of the most material, so it is the heaviest. |
Key Stage 3
Meaning
Weight is the the force on an object that is in a gravitational field.
About Weight
- Weight always acts downwards.
- All objects on Earth have weight because the Earth has a gravitational field.
- Different planets have a different strength gravitational field, so the same object might weigh a different amount on different planets.
Examples
Weight makes a tennis ball fall to the ground. | Weight holds the bowling ball to the ground. | If the weight of a boat were bigger than the upthrust the boat would sink. |
The weight of the car acts from its centre of mass. | The submarine has the same weight under the water as it would on land, but in the water this is balanced by the upthrust. | Planes can be very heavy but their weight is balanced by the lift. |