What is Newton’s First Law
An object remains at rest or moving at a steady speed (equilibrium) unless an external force acts on it
What is Newton’s Second Law
The acceleration that the resultant force produces on an object depends on the size of the resultant force and the mass of the object
What is Newton’s Third Law
- For every action there is an equal and opposite reaction; forces come in pairs
- Forces in an interaction pair: are the same size; act in opposite directions; and act on two different objects
How do you find out speed?
Using distance and time
What is a vector?
- Magnitude and direction
- Example: velocity
What is a scalar?
- Has magnitude only
- Example: speed
What does the gradient of a distance-time graph tell you?
The speed
What does the area under the line in the velocity-time graph tell you?
The distance
What does the gradient of a velocity-time graph tell you?
The acceleration
What are some examples of forces?
Friction, weight, upthrust and drag
What is force measured in?
Newtons, N
Can forces be contact and non-contact?
Yes
What does a force arrow show?
Size and direction
Is momentum conserved?
Yes
What does momentum is conserved mean?
Momentum before = momentum after
How is an object balanced?
If the anti-clockwise moments are equal to the clockwise moments about the pivot
What is a simple mechanism (e.g. levers and pulleys) ?
A force multiplier
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P1.1 The particle model6
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P1.2 Changes of state17
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P1.3 Pressure16
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P2.1 Motion21
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P2.2 Newton's Laws45
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P2.3 Forces in action30
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P2 (Extra)17
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P3.1 Static and charge14
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P3.2 Simple circuits41
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P4.1 Magnets and magnetic fields9
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P4.2 Uses of magnetism28
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P5.1 Wave behaviour14
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P5.2 The electromagnetic spectrum10
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P5.3 Wave interaction0
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P6.1 Radioactive emissions17
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P6.2 Uses and hazards3
