Difference between revisions of "Gravity"
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: [[Gravity]] is the [[force]] that pulls objects to the ground. | : [[Gravity]] is the [[force]] that pulls objects to the ground. | ||
: [[Isaac Newton]] was the first to realise that [[gravity]] is the [[force]] that holds the [[planet]]s in [[orbit]] around the [[Sun]]. | : [[Isaac Newton]] was the first to realise that [[gravity]] is the [[force]] that holds the [[planet]]s in [[orbit]] around the [[Sun]]. | ||
| + | : The [[force]] of [[gravity]] between two [[object]]s is always equal in [[magnitude]] but opposite in direction. | ||
| + | {| class="wikitable" | ||
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| + | |[[File:Picture.png|center|200px]] | ||
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| + | | style="height:20px; width:200px; text-align:center;" |Text | ||
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===Falling=== | ===Falling=== | ||
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=====Decelerating===== | =====Decelerating===== | ||
: When an [[object]] [[decelerate]]s away from the ground '''gravity''' is causing a [[Mechanical Energy Transfer|mechanical energy transfer]]. | : When an [[object]] [[decelerate]]s away from the ground '''gravity''' is causing a [[Mechanical Energy Transfer|mechanical energy transfer]]. | ||
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| + | ===Orbits=== | ||
| + | : [[Moon]]s [[orbit]] [[planet]]s and [[planet]]s [[orbit]] the [[stars]] due to [[gravity]]. | ||
| + | : [[Gravity]] is a constant [[force]] directed to the centre of a [[massive]] [[object]]. | ||
| + | : [[The Moon]] feels a [[force]] pulling it towards the centre of the [[Earth]]. The [[Earth]] feels a [[force]] equal in [[magnitude]] but opposite in direction to that of [[The Moon]]. | ||
Revision as of 13:42, 1 November 2018
Contents
Key Stage 2
Meaning
Gravity is a force that causes all objects to be attracted to each other.
About Gravity
- Gravity is a non-contact force.
- Gravity affects all objects.
- Gravity pulls us down towards the centre of the Earth.
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| If person A drops the cog it will fall towards the centre of the Earth. If person B drops the spanner it will fall towards the centre of the Earth. |
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| The planets are pulled towards the sun by gravity. |
Key Stage 3
Meaning
Gravity is a force that causes all objects with mass to be attracted to each other.
About Gravity
- Gravity is a force so it is measured in Newtons.
- Gravity is a non-contact force because it can act without objects touching.
- All objects are affected by gravity.
- Gravity is the force that pulls objects to the ground.
- Isaac Newton was the first to realise that gravity is the force that holds the planets in orbit around the Sun.
- The force of gravity between two objects is always equal in magnitude but opposite in direction.
| Text |
Falling
Energy Transfers
Accelerating
- When an object accelerates towards the ground energy is transferred from the gravitational potential energy store of the object to the kinetic energy store of the object.
Decelerating
- When an object decelerates away from the ground energy is transferred from the kinetic energy store of the object to the gravitational potential energy store of the object.
Forces
Accelerating
- When an object accelerates towards the ground gravity is causing a mechanical energy transfer.
Decelerating
- When an object decelerates away from the ground gravity is causing a mechanical energy transfer.