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13 February, 22:08

An athlete leaves one end of a pool of length L at t 5 0 and arrives at the other end at time t1. She swims back and arrives at the starting position at time t2. If she is swimming initially in the positive x direction, determine her average velocities symbolically in (a) the first half of the swim, (b) the second half of the swim, and (c) the round

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  1. 13 February, 22:18
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    a) v = L / (t1 - t0)

    b) v = - L / (t2 - t1)

    c) v = 0

    Explanation:

    The average velocity is calculated using the following equation:

    v = (final position - initial position) / (final time - initial time)

    a) For the first half of the swim:

    final position = L

    initial position = 0

    initial time = t0

    final time = t1

    Then, the velocity will be:

    v = (L - 0) / (t1 - t0) = L / (t1 - t0)

    b) For the second half of the swim:

    Final position = 0

    initial position = L

    final time = t2

    initial time = t1

    The velocity will be:

    v = (0 - L) / (t2 - t1) = - L / (t2 - t1)

    c) For the round:

    Final position = L

    Initial position = L

    initial time = t0

    final time = t2

    Velocity:

    v = (L - L) / (t2 - t0) = 0
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