I was recently given the task in my physics class to make a 10th grade level physics experiment for my class. We will be presenting them to elementary schools and the kids. Since it's a demonstration to elementary school students, I need to make it cool and exciting. I decided to make an experiment that shows what would happen if the earth had a hole in it that went out the other end. Of course I'm neglecting heat, friction, and air resistance. I'm also going to do this by using charged objects to act as gravity. The problem though that I've run into is that I'm not sure how to do this with the "earth" rotating. So how would you commpinsate for the Earth's rotational speed.