A waitress lifts an apple pie 5 meters from the ground floor to the second floor of the restaurant. If the pie is 0.30 kg, what is the Ep gained by the pie? *

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.