<em>if the object has 0 potential energy it means it is on ground .. <u>explanation : </u>to measure potential energy we take ground as a reference point but when object is placed on reference point i.e ground then height is 0.. as potential energy = mgh .. here h becomes 0 so potential energy is 0 joules..</em>
Since the meter stick is traveling with Jill, it will have the same speed as she does so relative to Jill, the meter stick is stationary so its length remains 1.00 m as measured by her.