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Speed and Newtons Laws (Vectors and Scalars (Vector Examples (Weight,…
Speed and Newtons Laws
Vectors and Scalars
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The main difference between them is that vector quantities have a magnitude and direction but scalars just have a magnitude
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Newton's 3 laws
2nd Law - "An unbalanced force will leader to an acceleration." The size of this acceleration is given by the equation: Force (N) = Mass (Kg) x Acceleration (m/s^2)
3rd law - "When body A pushes on body B, body B pushes back on body A in the opposite direction with the same force"
1st Law - "An object will remain at rest or move with a constant velocity unless acted on by a resultant force
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Acceleration
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This only applies for constant acceleration along a straight line:
Final Velocity^2 (m/s) - Initial Velocity ^ 2 (m/s) = 2 x Acceleration (m/s^2) x Distance (m)
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Stopping Distance
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Doubling your speed should in theory quadruple your stopping distance as both the thinking distance and breaking distance get doubled
Speed
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In a distance time graph, you can use the total time taken and the total distance traveled to figure out the speed