You launch a model rocket that has a mass of 2 kg. At a height of 400 m, it is traveling at 150 m/s. What is its kinetic energy at this point? A. 22,500 J O B. 113 J O C. 150 J O D. 45,000 J

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.