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  4. A block of mass 1 kg is pressed against a spring of force constant 400 N / m. The spring is compressed by 10 cm and block is released. Which of the following is a possible velocity of the block during subsequent motion?

Q. A block of mass is pressed against a spring of force constant . The spring is compressed by and block is released. Which of the following is a possible velocity of the block during subsequent motion?

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Solution:



As the maximum speed is , hence the range of speed should be between and .
Hence, options (1) and (2) are correct.

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