A string is stretched by 5cm. If a mass of 1kg is dropped from a height of 0.3m onto a spring whose force constant is 400Nm^-¹. Calculate the maximum distance the spring will be compressed
"\\frac k2(x_2^2-x_1^2)=mgh,"
"x_2=\\sqrt{\\frac{2mgh}k+x_1^2}=6.3~cm."
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