5. Apply: If the string connecting the puck to the center is cut, there will be no net force on the puck. (The force of gravity is offset by the turntable.) The puck will not accelerate or change direction, so it will move at a constant speed in the direction it was moving at the time the string was cut. How does this relate to the boy whirling a yo-yo given at the start of this Exploration sheet? When the boy with the yo-yo let it go, there were no more forces being acted upon the yo-yo, so would keep moving in a straight line at the same velocity and direction as when it was let go, exactly the same as the puck and the turntable