A horizontal string is tied to a wall on one end then run over a pulley with a hanging mass on the other end to make it taut. Which of the following changes would make the energy travel down the string faster if plucked on one end? O Plucking it harder (i.e. with a larger amplitude) Weaving the string with another string so that it is twice as thick Moving the pulley closer to the wall so that the horizontal portion of the string that is being plucked is shorter More than one of the above None of the above