Speed (Edexcel GCSE Maths): Flashcards

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Speed
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Definition of speed

How fast something moves; distance travelled in specific time

How to calculate average speed

Total distance ÷ total time

Formula for speed

S=DTS = \frac{D}{T}

Formula for time

T=DST = \frac{D}{S}

Formula for distance

D=S×TD = S \times T

Common units of speed (3 examples)

m/s, km/h, mph

Convert minutes to hours

Divide by 60

45 minutes in hours

34\frac{3}{4} hour

What type of quantity is speed?

Scalar (has magnitude only, no direction)

Three quantities in speed formula triangle

D (Distance), S (Speed), T (Time)

How to use the formula triangle

Cover what you want to find; position shows the formula

Why is unit consistency critical?

Units in answer depend on units used in formula

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