As an object moves in the x-y plane, which statement is true about the object’s average acceleration?
(a) The average acceleration for some period of time equals the change in the object’s speed during that period divided by the change in time during that period.
(b) The average acceleration for some period of time equals the change in the object’s velocity during that period divided by the change in time during that period.
(c) The average acceleration is equal to the object’s velocity divided by the time.
(d) The average acceleration is for some period is equal to the change in time during that period divided by the change in the object’s velocity during that period.
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