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What are positive and negative accelerat...

What are positive and negative acceleration in straight line motion?

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If speed of an object increases with time, its acceleration is positive. (Acceleration is in the direction of motion) and if speed of an object decreases with time its acceleration is negative (Acceleration is opposite to the direction of motion).
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Knowledge Check

  • If a particle has negative velocity and negative acceleration , its speed :

    A
    increases
    B
    decreases
    C
    remains same
    D
    zero

  • If a particle has negative velocity and negative acceleration, its speed

    A
    increases
    B
    decreases
    C
    remains same
    D
    zero

  • If a particle has negative velocity and negative acceleration, its speed

    A
    increases
    B
    decreases
    C
    remains same
    D
    zero

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