I need help with this physics question on instanteneous velocity? pls help 5 points asap?

Can the instantaneous velocity of an object at an instant of time ever be greater in magnitude than the average velocity over a time interval containing the instant? Can it be less?

Pls help.

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  • Anonymous
    1 decade ago
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    yes ofcourse

    if the velocity is increasing from 0 to 20 m/s in a time t and covering distance s then when it is 20m/s which is its instantaneous velocity will be greater than the average velocity

    if the velocity decreases from 20 to 0 m/s then when it is zero which is the velocity at that instant t which is zero will be obviously less than the average velocity because it did have velocities higher

    in general during acceleration instantaneous velocity at a later time t > average velocity from time o to t

    during deceleration then instantaneous velocityat a later time t < average velocity from time 0 to t

    its common sense even if the acceration or deceleration is not constant or uniform but it is always either always +ve or always negative and assuming direction of velocity doesnt change either

    all the best

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  • 1 decade ago

    The instantaneous velocity of an object can differ from the average velocity of an object over a period as long as the object undergoes some form of acceleration.

    example: a car accelerating from 40 - 50 mph over 10 seconds will have averaged 45 mph (assuming constant acceleration) but it will have only actually been doing 45 mph for an instant during the acceleration.

    Source(s): MPhys Student
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  • Anonymous
    1 decade ago

    Yes and yes.

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