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Answer :
Answer:
A. −1.11 m/s2
Explanation:
To calculate the object's acceleration, we can say:
acceleration = (final velocity - initial velocity) / time
The object's initial velocity is 120 m/s, its final velocity is 20 m/s, and the time it takes to travel the 2,500-meter path is 1.5 minutes, or 90 seconds (1.5 x 60 = 90).
Therefore:
acceleration = (20 m/s - 120 m/s) / 90 s = -1.11 m/s^2
Note
The negative sign, means the object is decelerating and not accelerating because the object is slowing down during the trip.
it is decreasing its speed as it travels, so it's slowing down over time. The absolute value of -1.11 is also called deceleration.#SPJ4
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