If a chicken accelerates from 2.0 m/sec to 3.2 m/sec north, what is the change in velocity (∆v)?

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To determine the change in velocity (∆v) of the chicken, you need to subtract the initial velocity from the final velocity, while keeping in mind the direction of the velocities since they are in the same direction (north). The initial velocity is 2.0 m/sec, and the final velocity is 3.2 m/sec.

Calculating the change in velocity:

∆v = final velocity - initial velocity ∆v = 3.2 m/sec - 2.0 m/sec ∆v = 1.2 m/sec

The positive value indicates that the velocity has increased in the same direction (north), which means the chicken is accelerating. Therefore, a change in velocity of +1.2 m/sec reflects the increase in speed from 2.0 m/sec to 3.2 m/sec. This makes it clear that the correct answer represents the actual increase in speed, showing how acceleration results in a positive change in velocity.