11.2 speed Flashcards by Stella LaMorte

Q

instantaneous speed

A

the rate at which an object is moving at a given point in time

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Q

what measures instantaneous speed?

A

a speedometer

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Q

a slope on a DISTANCE TIME graph indicates…?

A

speed

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Q

a slope on a VELOCITY graph indicates…?

A

acceleration

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Q

what is an example of a vector quantity?

A

acceleration and force

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Q

what is acceleration?

A

the rate at which velocity changes

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Q

what can acceleration be caused by?

A

a positive or negative change in speed

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Q

acceleration unit for gravity?

A

9.8 m/s2

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Q

unit for acceleration

A

m/s2

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Q

unit for speed

A

m/s

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Q

if velocity increases, acceleration is…

A

positive

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Q

if velocity decreases, velocity is…

A

negative

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