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*[[Distance]] - The greater the distance between [[object]]s the weaker the [[force]] of [[gravity]].
: When a small [[mass]] [[object]] is in the [[Gravitational Field]] of a large [[mass]] [[object]] the [[force]] on the small [[mass]] is referred to as [[weight]] rather than [[gravity]].
{| class="wikitable"
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|[[File:ForcesEqual.png|center|600px]]
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| style="height:20px; width:200px; text-align:center;" |[[Object]] A has 1[[kg]] of [[mass]] and is [[attract]]ed to [[object]] B. [[Object]] B has 2[[kg]] of [[mass]] and is [[attract]]ed to [[object]] A. The [[force]] acting on [[object]] A is the same as the [[force]] on [[object]] B.
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===Falling===
====Energy Transfers====
=====Accelerating=====
: When an [[object]] [[accelerate]]s towards the ground [[energy]] is [[Energy Transfer|transferred]] from the [[Gravitational Potential Energy Store|gravitational potential energy store]] of the [[object]] to the [[Kinetic Energy Store|kinetic energy store]] of the [[object]].
=====Decelerating=====
: When an [[object]] [[decelerate]]s away from the ground [[energy]] is [[Energy Transfer|transferred]] from the [[Kinetic Energy Store|kinetic energy store]] of the [[object]] to the [[Gravitational Potential Energy Store|gravitational potential energy store]] of the [[object]].
====Forces====
=====Accelerating=====
: When an [[object]] [[accelerate]]s towards the ground '''gravity''' is causing a [[Mechanical Energy Transfer|mechanical energy transfer]].
=====Decelerating=====
: When an [[object]] [[decelerate]]s away from the ground '''gravity''' is causing a [[Mechanical Energy Transfer|mechanical energy transfer]].
===Orbits===
: [[Isaac Newton|Newton]] was the first person to realise that [[object]]s were held in [[orbit]] by [[gravity]] which he [[explain]]ed in his [[Newton's Universal Theory of Gravitation|Universal Theory of Gravitation]].
: [[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]].
{| class="wikitable"
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|[[File:Orbit1.gif|center|400px]]
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| style="height:20px; width:400px; text-align:center;" |The [[planet]]s are pulled towards [[The Sun]] by [[gravity]].
|}