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24 May, 05:30

What are possible units of speed or velocity? A. km/hr B. sec/m C. kg/sec D. m/sec2

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  1. 24 May, 06:31
    0
    (any unit of length) / (any unit of time)

    is a unit of speed.

    When combined with a direction, it's a velocity.

    From the list of choices, only 'A' qualifies as a unit of speed.

    'B' is either a dimensionless number (sec/minute)

    or a unit of 'reciprocal speed' (sec/meter).

    'C' is a unit of rate of change of mass. There's no name for it

    'D' is a unit of acceleration.
  2. 24 May, 09:27
    0
    Speed or velocity is an expression that relates displacement or distance travelled per unit time. The SI unit for displacement is meter and kilometer is a derivative. The SI unit of time is seconds and a derivative is hour. Hence the answer among the choices is A. km/hr
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