【单选题】
A cumin canister (孜然罐) of mass 0.40kg slides across a horizontal frictionless counter (柜台) with speed 0.50m/s. It then runs into and compresses a spring (弹簧) with spring constant 750N/m. When the canister is momentarily (暂时) stopped by the spring, by what distance in m is the spring compressed?
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