Physics, 31.03.2020 02:46 therealpr1metime45

A 5.36×104 kgkg railroad car moves on frictionless horizontal rails until it hits a horizontal spring stopper with a force constant of 4.29×105 N/mN/m . When the railroad car comes to a complete stop, the compression of the spring stopper is 36 cmcm . How fast was the railroad car initially?

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A 5.36×104 kgkg railroad car moves on frictionless horizontal rails until it hits a horizontal sprin...