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Annie is walking to school leisurely at a speed of 1.0 m/s for the first half of her trip. She then remembers that her physics teacher told her that she must average 2.5 m/s to make it to school on time. Realizing she might be late, she starts running. However, after a quick calculation, she stops running--she's going to be late anyways.

a) show why she can't make it on time

  • physics -

    If she completed the second half of her distance in zero time, her average speed would be 2 m/s, which is not fast enough.

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