im doing questions from "Calculations for A-Level Physics" answers not provided for this Q. Question : A grinding wheel of radius 0.080m is driven by an electric motor at a constant speed of 50 rps. A piece of steel is pressed against the outer rim of the wheel, producing tangential force on the wheel of 7.0N (a)(ii)identify two forms of energy change which are occurring, stating where the changes taking place. one that i can think of is rotational kinetic energy, and where the changes taking place?? (b) a small fragment of the surface of the wheel breaks away from the wheel when it is in the position P shown in picture attached. the plane of the wheel is vertical. (i) draw the path of the fragment as it leaves the wheel, and state the angle to the horizontal of this path. the red line in the bitmap is the path that i think of. correct me im wrong.