When observed in an inertial frame of reference, all objects that experience no forces will appear to

Plss anybody know how to do this? ? i need the answers from a through d

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.

Coal contains energy. a. light b. kinetic c. chemical d. mechanical