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A 4.50 ✕ 105 kg subway train is brought to a stop from a speed of...

A 4.50 ✕ 105 kg subway train is brought to a stop from a speed of 0.500 m/s in 0.700 m by a large spring bumper at the end of its track. What is the force constant k of the spring? Incorrect: Your answer is incorrect. N/m

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Hi any doubts leave a comment... THANKS

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