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30 April, 22:56

A block with m = 300 grams oscillates at the end of a linear spring with k = 6.5 N/m. (assume this is a top-down view and the block is sliding on a frinctionless surface; neglect gravity)

a) what is the period of the block's motion in seconds

b) if the blovk's max acceleration is 2 m/s^2, what is the amplitude of the motion (m)

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  1. 30 April, 23:21
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    a) T=1.35s

    b) amplitude = 0.0923m

    Explanation:

    m=300 gr

    k=6.5 N/m

    first we need to get the angular frequency of the motion

    so we have that

    ω = √ (k/m)

    in this case motion is a simple harmonic so the period is defined by:

    T = 2π / ω

    T = 2π / √ (k/m)

    replacing the variables ...

    T = 2π / √ (6.5/0.3)

    T=1.35s (period of the block's motion)

    and ...

    α max = | ω²r max |

    2 = (2π/1.35) ² * r max

    r max = 0.0923m
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