A nonconducting charged slab 1 of thickness 2a has a nonuniform but symmetrical volume charge density rho0x/a, rho0>0. The sheet is centered, at x=0, on the yz-plane of a Cartesian coordinate system.
Determine the magnitude of the electric field in the region [−a < x < a] as a function of x, the distance from the yz-plane. Express your answer in terms of the variables rho0, a, x, and the permittivity constant ϵ0.

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction 

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