Difference between revisions of "Gravity"
(→Key Stage 3) |
|||
| Line 36: | Line 36: | ||
===Falling=== | ===Falling=== | ||
| − | ===Energy Transfers=== | + | ====Energy Transfers==== |
| − | ====Accelerating==== | + | =====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]]. | : 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==== | + | =====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]]. | : 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=== | + | ====Forces==== |
| − | ====Accelerating==== | + | =====Accelerating===== |
: When an [[object]] [[accelerate]]s towards the ground '''gravity''' is causing a [[Mechanical Energy Transfer|mechanical energy transfer]]. | : When an [[object]] [[accelerate]]s towards the ground '''gravity''' is causing a [[Mechanical Energy Transfer|mechanical energy transfer]]. | ||
| − | ====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]]. | ||
Revision as of 13:34, 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.
 |
| 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. |
 |
| 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.
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.