What do uou understand by the term acceleration ? When is it positive and when is it negative ?
What do uou understand by the term acceleration ? When is it positive and when is it negative ?
$(i)$ Rate of change of velocity is called acceleration.
$(ii)$ Acceleration is taken to be positive if it is in the direction of velocity and negative when it is opposite to the direction of velocity.
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$(c)$ What does the straight line $AB$ represents ?
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