Instantaneous Speed (OCR GCSE Physics A, Combined (Gateway Science Suite)): Flashcards

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Instantaneous Speed
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Define instantaneous speed

Speed of an object at a particular instant/exact moment

What does a speedometer display?

Instantaneous speed at that exact moment

What does fitness app speed show during exercise?

Instantaneous speed at each moment

How does a speedometer measure speed?

Measures how fast wheels are turning at that moment

What do radar guns measure?

Speed of vehicles at a particular instant

What do GPS & sensors provide?

Real-time instantaneous speed data

How to calculate instantaneous speed

Use distance travelled in very short period of time

Speed if car travels 4.24.2 m in 0.70.7 s

66 m/s

Define constant/steady speed

Instantaneous speed has same value throughout journey

Formula for speed

speed=distancetimespeed = \frac{distance}{time}

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