A ball of mass 50g moves with a speed of 30 m/s. If its speed is measured to an accuracy of 0.1%, what is the minimum uncertainty in its position? What does this answer indicate about the relevance of quantum mechanics to macroscopic objects? I am completely confused. My prof just gave us HUP but didn't explain how to use it. I know: (delta p)(delta x) > h /2, where h is actually h bar i just don't know how to type it. I think i need to sove for delta x, but i have tried similar problems that i have the answers to and i'm not even close. please, if anyone can help me understand this i would greatly appreciate it. Thanks.