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= Concept Map =

=== Concept Map ===

[[File:Acceleration_due_to_gravity.mm|Flash]]

[[File:Acceleration_due_to_gravity.mm|Flash]]

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= Textbook =

=== Additional resources ===  

 

= Additional information =

==Useful websites==

#The Value of "g".  This is a good [http://www.physicsclassroom.com/Class/circles/U6L3e.cfm resource] to study the variation of “g” at various distances above the Earth's atmosphere.

#The Value of "g".  This is a good [http://www.physicsclassroom.com/Class/circles/U6L3e.cfm resource] to study the variation of “g” at various distances above the Earth's atmosphere.

#This [http://science.nasa.gov/science-news/science-at-nasa/2004/06may_lunarranging/ article] examines the Galileo experiment and discusses if there are other possible explanations.

#This [http://science.nasa.gov/science-news/science-at-nasa/2004/06may_lunarranging/ article] examines the Galileo experiment and discusses if there are other possible explanations.

==Reference Books==

===Concept #1 - Gravitational force due to the Earth produces an acceleration===

 

 

= Teaching Outlines =

#Gravitational force due to the Earth produces an acceleration in the objects. This is the force acting on a freely falling object.

#Gravitational force due to the Earth produces an acceleration in the objects. This is the force acting on a freely falling object.

#The value of acceleration is not dependent on the mass.

#The value of acceleration is not dependent on the mass.

#All freely falling bodies gain same acceleration.

#All freely falling bodies gain same acceleration.

 

====Learning objectives====

==Concept #1 - Gravitational force due to the Earth produces an acceleration==

===Learning objectives===

#To understand what causes an object to fall - the force and the acceleration

#To understand what causes an object to fall - the force and the acceleration

#Calculating the value of "g"

#Calculating the value of "g"

===Notes for teachers===

====Notes for teachers====

''These are short notes that the teacher wants to share about the concept, any locally relevant information, specific instructions on what kind of methodology used and common misconceptions/mistakes.''

''These are short notes that the teacher wants to share about the concept, any locally relevant information, specific instructions on what kind of methodology used and common misconceptions/mistakes.''

'''Free fall and acceleration due to gravity'''

'''Free fall and acceleration due to gravity'''

A freely falling body undergoes acceleration. This acceleration is caused by the gravitational force exerted by the larger mass of the Earth. This is referred to as acceleration due to gravity. The Earth also undergoes an acceleration due to the gravitational force exerted by the object. We do not notice it because of the mass of the Earth.  This is represented by "g" and has the value of 9.8 m/s^2.

A freely falling body undergoes acceleration. This acceleration is caused by the gravitational force exerted by the larger mass of the Earth. This is referred to as acceleration due to gravity. The Earth also undergoes an acceleration due to the gravitational force exerted by the object. We do not notice it because of the mass of the Earth.  This is represented by "g" and has the value of 9.8 m/s^2.

''These are short notes that the teacher wants to share about the concept, any locally relevant information, specific instructions on what kind of methodology used and common misconceptions/mistakes.''

''These are short notes that the teacher wants to share about the concept, any locally relevant information, specific instructions on what kind of methodology used and common misconceptions/mistakes.''

Gravity (a force we call weight) is actually responsible for keeping the space craft and the astronaut in orbit around the earth. Gravity is still pulling on the astronaut. The feeling of weight;ess is no differenet than when in ree fall. What they are not experiencing is the normal force, which is the opposing force. When that force is gone, we feel say we feel "weightless." In fact, whenever a person is in freefall they feel weightless even though gravity is still causing them to have weight. While in orbit, the space shuttle does not have to push on the astronaut (or anything else in the cabin) to keep him up. The space shuttle and the astronaut are in a constant state of freefall around the earth.<br><br>

Gravity (a force we call weight) is actually responsible for keeping the space craft and the astronaut in orbit around the earth. Gravity is still pulling on the astronaut. The feeling of weight;ess is no differenet than when in ree fall. What they are not experiencing is the normal force, which is the opposing force. When that force is gone, we feel say we feel "weightless." In fact, whenever a person is in freefall they feel weightless even though gravity is still causing them to have weight. While in orbit, the space shuttle does not have to push on the astronaut (or anything else in the cabin) to keep him up. The space shuttle and the astronaut are in a constant state of freefall around the earth.<br><br>

= Project Ideas =

===Concept #2 - How does gravitation cause acceleration===

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