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Q.

A 12kg block moving with 5 m/s strikes a spring of force constant 1000 N/m attached to another 12kg block at rest. Kept on a smooth floor. The time for which the rear moving block remain in contact with the spring will be (Assume π=10)

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a

110s

b

120s

c

130s

d

140s

answer is B.

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Detailed Solution

Required time is half of time period =πμk=π1/41000=1400=120s

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A 12kg block moving with 5 m/s strikes a spring of force constant 1000 N/m attached to another 12kg block at rest. Kept on a smooth floor. The time for which the rear moving block remain in contact with the spring will be (Assume π=10)