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You exert a 250 N push the leftmost of two identical blocks of mass 286 g...

You exert a 250 N push the leftmost of two identical blocks of mass 286 g connected by a spring of stiffness 543 kg/s2. After pushing the block a distance 12 cm, you release it; by this time the rightmost block has moved a distance 8 cm.

A). What is the energy in the oscillations between the blocks?

B). What is the speed of the center of mass after the push?

C). What is the initial relative speed between the blocks?

D). What is the amplitude of oscillation?

E). What is the fastest linear speed of the block?

F). What is the slowest linear speed of the block?

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