Today at church, I was pondering my blog assignment and thinking, “Where on earth can I find something to do my physics blog on?” Suddenly, a tall man went up to the pulpit to say a few words. In order for the microphone to reach his mouth, the bishop had to raise the pulpit. The machine that allows the pulpit to move, does WORK as it pushes the pulpit upwards a certain distance. The amount of work done by the pulpit machine is equal to the force applied (which would be around the weight of the pulpit) times the distance the pulpit was raised. After the tall man spoke, a shorter man went up to speak. Since the pulpit was too high, the bishop once again had to move the pulpit down to its original position. In physics we learn that net work is equal to force times displacement. The net work performed by the pulpit machine after the bishop moved it back down would be zero because the displacement is zero (it returned to its original position). It’s amazing that physics applies to church! J (THIS VIDEO WAS NOT TAKEN DURING CHURCH, BUT ITS THE SAME PULPIT)
what a fancy pulpit! however your use of net work is different from what we discussed in class...
ReplyDeletethats an interesting topic to choose as a physics example. cool
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