Physics - P8 - Forces in balance.
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9 Terms
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Scalar
They have magnitude but no direction
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Vector
They have both magnitude and direction.
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Displacement
A distance travelled in a given direction.
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Force
It can change the shape of an object or change its motion or state of the rest.
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Unit of force
Newton (N)
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Contact force
A force that acts on objects only when the objects touch each other.
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What is a resultant force?
A single force that has the same effect as all other forces acting on an object.
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What is Newtons third law of motion?
When two objects interact with each other, they exert equal and opposite forces on each other.
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What is Newtons first law of motion?
If the forces acting on an object are balanced, the resultant is zero.
Note 
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