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12 October, 22:16

A car starts from rest and uniformly accelerates to a speed of 30 mi/h in 6 s. The car moves north the entire time. Which option correctly lists a vector quantity from the scenario?

speed: 30 mi/h

acceleration: 5 mi/h/s north

distance: 30 mi

velocity: 5 mi/h/s north

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  1. 12 October, 22:24
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    acceleration: 5 mi/h/s north

    Explanation:

    A quantity can be either vector quantity or scalar quantity, a vector quantity is a quantity with both magnitude and direction while a scalar quantity has magnitude only.

    Examples of vector quantities include; velocity, acceleration, displacement, etc.

    Acceleration is the rate of change of an object's velocity per unit of time. It is given by the formula; Velocity/time

    Therefore in this case; a = 30 mi/h / 6 s

    = 5 mi/h/s

    Therefore;

    Acceleration = 5 mi/h/s
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