A catapult is made by connecting a light elastic cord of, Ask an Expert

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A catapult is made by connecting a light elastic cord of natural length 2a and strength α between two fixed supports, which are distance 2a apart.

A stone of mass m is placed at the center of the cord, which is pulled back a distance 3a/4 and then released from rest. Find the speed with which the stone is projected by the catapult.

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