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13 June, 12:44

An archer pulls her bowstring back 0.376 m by exerting a force that increases uniformly from zero to 251 N. (a) What is the equivalent spring constant of the bow? N/m (b) How much work does the archer do on the string in drawing the bow? J

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  1. 13 June, 15:07
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    (A) 667.5 N/m

    (B)

    Explanation:

    (A) Let the spring constant be k.

    Using the formula F = kx

    k = 251 / 0.376

    K = 667.5 N/m

    (B)

    Work done

    W = 0.5 * kx^2

    W = 0.5 * 667.5 * 0.376 * 0.376

    W = 47.2 J
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