Sarah Robles and the Mechanics of Weightlifting
U.S. weightlifter Sarah Robles relies on an athletic mix of strength, speed and timing to help create explosive power when she competes at the 2012 Summer Olympics. Robotics engineer Brian Zenowich compares Robles' movements to those made by the WAM Arm, one of the world's most advanced robotic arms.
Credit: National Science Foundation and NBC Learn
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