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the boy stretches the slingshot .3m. this causes the small rock being held to drop .1m vertically below the launch point. when fully stretched, the

the boy stretches the slingshot .3m. this causes the small rock being held to drop .1m vertically below the launch point. when fully stretched, the small rock which is held is at rest. when released, the small rock (m= .12kg) travels at 16 m/s. what is the effective spring constant, k, of the sling shot?

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