Answer C. The magnetic field changes direction too.
C.
Coal is considered a "fossil fuel" and undergoes an extensive process of pressured materials in the Earth's inner core.
Displacement is the area under the velocity/time graph. So for example this object's displacement in the first 3 seconds is (1/2)(3sec)(12.5 m/s)= 18.75m. (and then it starts backing up, displacement decreasing, after 3sec when velocity is negative).
But This object is never speeding up. Its velocity is smoothly decreasing at (25/6) m/s^2 (the slope of the graph). So the answer to the question is actually zero.
Charge = 0.2 Ah is the correct answer...
