Understanding Gravity
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Malaysia SPM Form 4, Chapter 2: Force and Motion
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Contents |
[edit] Mind Map
[edit] Gravitational Field
A gravitational field as a region in which an object experiences a force due to gravitational attraction
[edit] Gravitational Field Strength
The gravitational field strength at a point in the gravitational field is the gravitational force acting on a mass of 1 kg placed at that point.
Unit: N/kg
Symbol: g
[edit] Formula
[edit] Gravitational Acceleration
The gravitational acceleration is the acceleration of an object due to the pull of the gravitational force.
Unit: ms-2
Symbol: g
Important notes:
- Gravitational acceleration does not depend on the mass of the moving object.
- The magnitude of gravitational acceleration is taken to be 10ms-2.
[edit] Gravitational Field Strength vs. Gravitational Acceleration
- Both the gravitational field strength and gravitational acceleration have the symbol, g and the same value (10ms-2) on the surface of the earth.
- When considering a body falling freely, the g is the gravitational acceleration.
- When considering objects at rest, g is the Earth’s gravitational field strength acting on it.
[edit] Weight
The weight of an object is defined as the gravitational force acting on the object.
Unit: Newton (N)
[edit] Free Falling
- Free falling is a motion under force of gravity as the only force acting on the moving object.
- Practically, free falling can only take place in vacuum.
[edit] Falling from high place
Acceleration = 10ms-2
Initial velocity = 0
Displacement = high of the location
[edit] Launching object upward
Acceleration = -10ms-2
Velocity at maximum height = 0
[edit] Frequenly Asked Question
[edit] Additional notes
[Additional notes content information relates to this topic but may not be in the SPM syllabus]
